Saturday, November 15, 2014

Helm Visability

I'm told hard dodgers really restrict visibility and make judging sail trim difficult.

Whatever


I was bored and the wind went light. The day before I had done hours blasting into 20 knots with 45F air temperatures; a hard dodger is the difference between a pleasant day in a sun room and frostbite on the nose. Oh, it's still plenty cold on deck!

(Fall is wonderfull on the Bay; wind, empty waters, and quiet coves. But it can put a premium on warm clothes, dodgers, and cabin heaters. But a cozy night with a movie, hot tea, and lots of blankets beats sweating it out.)

Dyneema Lifeline Burn Through

Dyneema has generated a lot of interest as a lifeline material; light, easy to fit, and comfortable to the hand. There are issues with chafe at stanchions (solved by polishing and sometimes chafe guards), but never the less, it was approved by ISAF 2 years ago.

But now ISAF is reversing course. There have been chafe failures due to rail meat and poor installation. They could stand that, I suppose, except it keep happening. Sometimes it is installation stupidity. Sometimes delivery crews switch to wire (more trust) and screw up previously polished holes, leading to failures. Ironic.

More concerning are cases of burn through, where the friction of a line, typically a spinnaker sheet on a large yacht (the only documented cases have been on maxis), generates enough friction to cut through a line in a single bad jibe. This can't happen on a small yacht (forces and lengths too small), but certainly it can be a source of wear, depending on the rigging locations. Many have been happy with Dyneema. Never the less, ISAF is now allowing Dyneema on class 1 and 2, but requiring wire on all higher classes. They are hoping to generate experience before revisiting the issue.

Judging from the burns on my PVC covers, this is a problem in need of a solution, at least on my boat.

Monday, September 29, 2014

Bleach and Aluminum Corrosion

Rev. 10-14-2014

I've got a series of 4 articles on water treatment coming out in the next few months, describing a simple approach, soup to nuts. One of the more interesting things to come of it is a treatment that seems safer for aluminum tanks. Both of these images show the worst pit after 14 days, at about 200 magnifications.

Puriclean Aqua Mega Tabs, 1 ppm free chlorine. Later I determined that I could lower the dose 4x below this and still maintain the same free chlorine due to the cyanurate buffering. Overall, the surface has been smoothed rather than pitted, with ~ 50% reduction in weight loss.

Both photos are same magnification; the bleach roughened the surface more.

So expect 10-20x less than this.


Bleach 1ppm, free chlorine.

Safer for aluminum tanks? That is my impression, particularly if the dose is lowered below manufacture recommendations to the lowest effective dose, but more confirmation work is needed.

What about hydrogen peroxide? During the writing of my water treatment articles, numerous sailors asked me to consider H2O2 as an alternative to bleach for aluminum tanks. One problem, of course, the lack of established standards for sanitizing with hydrogen peroxide. The Water Quality Association (certifying organization, similar to NSF) recommends 30,000 ppm hydrogen peroxide (3%), which is full-strength drug store peroxide, and 3 hours contact is required. Compare this to 30 ppm for bleach with a required contact time of 1 minute. There is no recommendation for routine use, but health approvals place and absolute limit of 1000 ppm peroxide, which is most likely below the effective dose. Not at all practical, and any stories of effectiveness at lower levels from cruisers are anecdotal and probably not based upon any science.

But just for laughs I did some corrosion test, using 3000 ppm peroxide for 4 days (ASTM D1384 test coupons at 65F).

No pitting... but remember this would have taken 40 pint bottles to sanitize a 25 gallon tank, even then using only 10% of the WCA recommended dose. Not practical.

  • Aluminum. Minor discoloration, no pitting.
  • Brass. Minor discoloration
  • Copper. Minor discoloration
  • Solder. significant corrosion, about like bleach on aluminum. Expect premature failure.
Compared to other products? The top image, without blemish, is Aqua Mega
 

Friday, September 26, 2014

Fresh Water Flush--a Miniature Water Closet?

Seawater contains bacteria and sulfate. Flush with seawater, deprive the bacteria of oxygen for long, and facilitative (those that can go aerobic or anaerobic) start using sulfate (SO4-) as an electron source. The result is H2S (rotten eggs) and the head stinks. The cure? Either use the head every 8 hours (thus, smell is not a problem when living aboard or actively cruising) or flush with fresh water.

But you can just plug the freshwater pipe into a manual head; water will blow through, flooding the compartment, and bugs can swim up-stream. The water closet, introduced a century ago, prevents both by employing a float valve and creating an air gap (bacteria can't fly, as a rule).

What about a miniature water closet? $38 from McMaster Carr


Made for commercial ice machines, this unit holds enough to flush 3' of 1.5 inch line--not enough for most manual heads--and refills at 0.33 gpm, or about 1:20 seconds per full flush (12 strokes or so). Clearly, a larger size, holding about 60 cubic inches, is what is needed. It could also be expanded by mounting a 1-3' length of 3" pipe under it to serve as a reservoir (4' of hose can be flushed for every 1' of 3" pipe). Mount it to a bulkhead somewhere handy and you should be good to go. A pair of valves would allow switching from seawater and isolation.

But I haven't tried it. I'm happy enough with sea flush and a rinse with potable using the shower head before going home.

Friday, September 12, 2014

Knees, Close-up and Dirty


 The protruding wire does make for some odd bumps and can be sore against pants, and kneeling on the cap is out of the question.
 
31 years ago during an informal club bicycle race I dodged a pedestrian, got into the gravel, and shattered my right knee cap into 16 pieces. It healed up well, all things considered, though it is lumpy and 20% larger than its mate. I still have some wire, the back side was rough enough that sustained cycling was out for almost 25 years, and I had some permanent weakness in my right quad; I tended to favor it.

A little rough on the backside, but the Doc says it will go the distance. Not bad for that long after that much repair.


The wire broke during the healing process, but its purpose was served. No need to remove it. Notice the spacing is less on the right side, though I may not have been standing straight.

And as a result of favoring it, I tend to come down more straight-legged on occasion, which ironically, is the opposite of a favor. Additionally, having very flat feet (feet pronate inwards), a disproportionate amount of weight is carried on the medial side, in spite of wearing orthodics for the past 30 years. A year ago I felt and heard a pop in my knee when stepping high on a boulder, heel to butt with all of my weight on that leg; I started a tear. It bothered me some, never felt right, but never caught. Then a few weeks ago, while helping my daughter move back into college, the tear spread. I felt like I was taking light loads, not moving too fast, and I never felt anything... until it tightened up an hour later. ~ 8 trips up 6 flights was too much.

A nice little tear. Though it would bear weight, bending the knee more that 10 degrees cause locking and lots of pain.

 Cleaning Up...

And a few signs of wear, but not too bad for an old guy. Should go the distance, with some increasing pain.

While it is too soon to say much, just one day after surgery it hurts less than it did. They say I can go back to skiing and all that, but I think I'm done with that; I know I can't back down from the double blacks, so I'm better off going sailing and wearing a brace, just to be sure.

But for the next few weeks... time to write, I guess.

Update, 9-13-2014. As surgery meds wore off, the pain showed up. I strong recommend getting a Breg Polar Care 500 ($168), whether insurance will cover it or not. My wife had one left over from knee replacement surgery, and this is the only way to keep ice on the knee at night. This really helps with both swelling and pain. The temperature is adjustable, but if you wear an Ace bandage on the knee, the amount of insulation is perfect for comfort. Lasts about 10-12 hours on a fill of ice. The knee version (not pictured but very similar) comes with Velcro.

During the day, packs of frozen veggies (one over, one under) are best, conforming nicely. We get ones we don't like (lima beans) so that we don't accidentally try to eat something that has been refrozen 20 times.

Update, 9-18-2014. I'm mostly off the cane, but I walk slowly and stairs are still far out of the question.Still icing (Breg) at night.

Update, 10-5-2014.  Started on exercise bike. Mowed part of the grass yesterday, but did no try to finish. A little muscle soreness today, but the joint seems fine.


Wednesday, September 10, 2014

Re-hooking

After about 5 years of faithful service, my collection of saltwater plugs was looking sad. One fish lost to a hook that snapped off, a little too much metal gone. Time for new teeth.



Is it worth the trouble for a few lures? These are good sized lures, $10-$15 each for 8 of them, so yeah, time well spent. About $2 for the hooks and 15 minutes work, they should serve another 5 years. It's also good to inspect the rig, trim the end off, and tie new knots.

Other lures are generally just replaced. Jigs are cast in one piece, and generally the skirt goes first. Blue fish hose eels are generally too chewed up to worry over, and the stainless hooks last forever.

Boot Drier

A few days ago I was following a thread on a sailing forum regarding how to best dry a pair of high-dollar leather and Goretex seaboots. Suggestions from experts ranged all over, but missed that most obvious answer; a boot drier. Perhaps this won't resonate with warm climate folk, but it should; I've seen enough mold and mildew in Florida to make it the state plant... if it were a plant.

I built this one15 years ago in an evening, for the specific purpose of drying wet snow gear, but it has certainly been used far more for rain soaked gear.



Even the most sodden boots, shoes, or gloves are dry, warm, and fresh in a few hours. Odor is eliminated, as there is no chance for anything to grow. Wet gear has a proper place, and space is conserved since less gear is needed. The materials came entirely from the might-need bin, but I suppose it could be built for $30 if everything were purchased. It could be made longer, for a larger family, with very little change in cost.

The fan provides just enough flow. A bit of flashing creates an internal baffle, directing all of the air flow over the bulb before it goes to the pipe outlets. A 60W bulb seems to provide just enough warmth, but a larger bulb or lamp-base heater could adapt the design to larger sizes. Hardware cloth keeps small fingers and trash out. Pipes could be made longer for sea boots. The unused pipes are plugged by dropping a large bolt in the hole, focusing the heat on a reduced number of holes. The weight is sufficient to keep it from tipping over.

  • 110v computer fan
  • ceramic socket with 60W bulb 
  • box and switch
  • a salvaged cord
  • 3/4" lumber and some screws
  • 3/4" PVC pipe stubs
  • a bit of flashing and some hardware cloth
  • paint
What would I change? I should have built it for 8 pipes (4 boots + 4 gloves) to better serve 2 people. I should have made the pipes just a little longer (no so much that it could tip over) and drilled a cross-wise hole near the end (so that they cannot be blocked if the boot is sitting on the end). But Jessica is off to college, so it's really just me playing outside, and it works quite well as it is.

I've been tempted to build something similar into the boat--it's really sweet to have warm, dry shoes in the winter--and perhaps I will if I start cruising more in the off season, now that school schedules don't matter.  Perhaps something that diverts warm, dry air from the mini-dehumidifier.

Tuesday, September 2, 2014

Idea Drive

I get hooked on testing boating related stuff, On one hand, the projects sometimes become rather time consuming, but on the other hand, when I run out of projects I get bored, and my wife tells me that is bad.

A few of the things I have written about for Practical Sailor, not including follow-ups:
  • Gasoline additives--phase separation (none work)
  • Gasoline additives--corrosion (yup, some really work)
  • Gasoline vent filters--best adsorbants (silica gel lasts for years)
  • Gasoline vent filters--effect on corrosion (yup, helps, may be main factor)
  • Diesel vent filters--effect on corrosion (yup, helps)
  • Diesel additives--biocides
  • Diesel additives--corrosion
  • Wire Corrosion--1-year saltwater environment chamber test of spray and grease inhibitors
  • Sanitation hoses
  • Holding tank chemicals
  • Holding tank vent filters
  • Dehumidifiers and desiccants
  • Joker valves and chemicals (PG antifreeze lost)
  • Joker valves--field trials (Raritan won)
  • Glycols--winterizing, burst point, and corrosion
  • Glycols--biological fouling resistance
  • Glycols--engine coolants
  • Whipping twine
  • Sewn splices--strength testing
  • Abrasion resistant line coatings and chafe guards
  • Mildew preventatives, both coatings and vapor-type.
  • Water repellant treatments for canvas. Long-term.
  • Flexible window materials (Strata Glas etc.) and waxes. Long term.
  • Water filtration--filling the tank
  • Water treatment in the tank
  • Water filtration--final polish at the tap
  • Mantus chain hook and bridle
  • Anti-mildew chemicals
A few things that are in process:
  • Gaffers tape
  • Soft shackles
  • Battery and coolant top-off water
  • One-drop oil tests
  • Gasoline additives--anti-oxidation and gum
  • Diesel additives--anti-oxidation and gum
  • Dyneema lifelines and chafe
What topics are of interest? Test ideas? I do best when there is a chemistry angle, but I'm open to anything; if it doesn't interest me I will pass it along.

Monday, September 1, 2014

Sifting Through Old Pictures

Sometimes the basement needs a little cleanup, and since a knee injury has me sidelined from sailing and heavy work, sifting through a box of old pictures was worthwhile enough.


My first boat, Prindle 16, about 1984. Photographed with my mother and grandfather. This was the first day sailing with my new asymmetrical chute. Because the they were nearly unheard of on beach cats, kits weren't available, and I had no money, we sewed this one from a pattern of my own design. Very fast. Later I added aluminum hiking racks, a bow sprit, and some additional roach, which really made her into a speedster that tacked downwind.

Taught me to sailing tender boats fast.


Our first week with our Stiletto 27, Cherokee Sun, 1992.  Later she got repainted, added a chute, bigger motor, and limited cruising amenities.

Taught me to sail tender boats even faster (this one tacked downwind too, with the chute), without capsize, and whetted my taste for cruising.



Jessica's First bluefish. Fun stuff. 

Taught me how to stay a kid. She's in college now.





Saturday, August 30, 2014

Quiet

Tying up a halyard so it doesn't slap.

Tuesday, August 26, 2014

Sail Trim Rant

My blog, my opinions. Some I can support, but I don't need to. I love a good rant.

When I started my career 30 years ago, my supervisor was a hard working man with only a few business classes. He did very well for himself, using hustle and dependable common sense to drive our business to more dependable success than our generally better educated and better financed competitors. After assigning a particularly thankless job to a laborer or contractor, or after watching some failure of common sense, he often proclaimed that he was "glad he paid attention in school." In fact he was very well educated by the school of careful observation. The primary reason I can pass practically every sailboat I meet--there aren't too many racers in the area, but there are certainly many much larger cruising boats--is because I pay attention. To me, that art and science of converting wind into motion is much or what makes sailing worthwhile.

My rules of boat speed.

Sail Trim
  1.  Don't over sheet reaching. The most common fault on a reach, is for everything, more or less, to be sheeted in. Embarrassing proof to everyone that you don't know how to sail.
  2. Don't over sheet to the weather. While a racing monohull with good foils and flat sails--the kind of guy that writes manuals on sail trim--will carry the traveler above the center line and boom on the center line, that doesn't mean the is correct for a cruising boat. You're going to have to experiment, pacing other boats, but cracked-off just a hair is generally faster for boats with more drag and lesser foils. The more you can sheet out, the more drive is forward.
  3. Twist. There is never a reason that main should not twist to match the wind; less hard on the wind, more off the wind. By proper application of traveler and vane, lead and barber hauler, working sails can always be twisted to match. Wind speed, and thus direction, on deck and aloft are different.
  4. Barberhaulers and outside tracks. Add the hardware that is needed, for other wise 1/2 of your sail area is wasted through improper trim. Look at other boats and don't be afraid to drill holes.
  5. Flogging sails. The wind came up a little, so they luff the sails to reduce power. Oh dear. Reef!
  6. One-sail in a blow. This isn't seamanship, this is laziness, and it results in shortened sail life. Often the sail is pressed far beyond its recommended wind range, because the force is not spread across 2 reduced sails. Instead of stowing one sail, reduced both; the result is faster and better balanced. Jib-only can also endanger the rig in some boats (mast support improper), and forestay tension (luff sag) generally suffers (on many boats mainsheet tension is a major contributor to forestay tension).
  7. Do NOT keep the topping lift so tight the sail never takes the load. Leach stretch is NOT reduced by keeping the topping lift on; this is pure urban legend. It can, however, be made worse, since when reaching the load is not carried across a taught sail but just on the leach and battens. Other sailors see the tight lift and snicker. (Very light winds can be an exception, when the lift can support the boom and allow twist, but most cruisers are motoring then).

Clean Bottom
  1. Best paint. Given what you pay for the boat, slippage, and hauling, bargain shopping for paint is pound foolish. For multi-season soft paint, I've tried many and like Micron 66 best; you do need ~ 7500 ppm salinity for it to stay on, making Deale about the northern limit in the BAY. I have no experience with hard paints or single-season paints. If it says West Marine on the label, you've made a mistake.
  2. Don't buy a low VOC paint because you think you have too. If it doesn't last longer and save fuel, it is not environmentally better, not over a full life cycle.
  3. Swim. You are going to have to clean the bottom, at least occasionally. If you aren't comfortable in the water I can't imagine why you took up sailing. I'm sure there are good reasons, I just can't imagine them. If the water is cold, get a wet suit for emergencies (rope around prop, hull damage, MOB, anchor stuck, some groundings). Take it easy on soft paints; frequent sailing is better than cleanings.
  4. Use it up (soft paints). Toward the end of the paint's useful life, give it a scrub or 2. This will minimize the need for sanding and improve bonding. Try to scrub in an area with a good tidal flush and few sensitive receptors; the harbor is not the best place, a river-mouth sand bar is probably better, depending on local geography, of course. If it seems like hard work, think of it as good exercise.
 Loose the Weight

  1. Go through the cabinets every spring. Never know what you will find, perhaps something that's gone missing.
  2. Spares. Are you really going to fix that item while on cruise, or would you wait until you are home? Then take it home. To much junk at home already? Pitch some. Stop buying stuff.
  3. Calculate the cost of carrying junk. It will embarrass you.
  4. Think of weight with every new project. Can it be lighter? Is it worth the weight, windage and complication?
 Good Sails. Obviously important going to the weather (doesn't really matter off the wind), but if you can't afford or justify new canvass...
  1. Downhaul hard. This will help move the draft forward by stretching the luff.
  2. Flatten with outhaul. I've met sailors that didn't know it was adjustable. Just pitiful.
  3. Flatten the genoa with an outboard lead (barber hauler or traveler). This will reduce twist a bit, but the reduction in draft is generally worth it up-wind.
  4. Recut. Sometimes tightening just one or two seams will work wonders. Read up on sail making and/or ask a sailmaker. Stiffer battens can help and increasing batten tension supports the luff. Sailmaking is not a black art, and every sailor should understand how design relates to sailing.
  5. Reef earlier. Stretched sails have more draft and thus more power. Reefing also can help flatten sails, but that is variable.
  6. Take your lunch to the office in a bag. Soon you will save enough for new sails.
Practice

  1. Pace other boats. There is no substitute for measuring your speed against another boat on the same course; variables of sea state and wind even out.  Is your speed less or about the same? Good. Now start pulling strings--more twist or less, tighter and looser--until you start going faster. It's not a race, just the best way of seeing what is better and what is not. I'd been sailing fast cats for years and I had to adjust my sail trim quite a bit for the PDQ.
  2. Build a speed polar. Perhaps this is overkill for most, but how do you know what is good for the conditions? Write it down, when you think you've got the trim just right. Compare with next time.
  3. Watch course over ground (GPS) more than compass; you may be going more sideways than you think. For areas with strong tides, this is much more complicated. Hope you remember trig and physics.
Engine. No I will NOT suggest power is the best way to windward. A car is much faster.
  1. Use the fuel. You might as well use at least one tank each year. Whether gas or diesel, whether you use a stabilizer or not, it needs changed, just like the oil. Since most engines die from dis-use rather than use, the hours to burn one tank annually is actually a contribution to good maintenance.
  2. When the wind is just a little too noserly to sail with many tacks and you really have somewhere to be, motor straight to windward, then sail when the angle is better or the wind has come up (afternoons are often better). You might just get a little more sailing in that way. Boy will it seem quiet.
  3. Read a book. Makes motoring more fun.
Fear of Spinnakers
  1. If you don't fly the chute, when the conditions are reasonable, you just aren't a sailor. Sorry, it's part of the art. Kind of like skiers that stay on the greens. Why bother.
  2. If the sail is hard to fly, perhaps the rigging is wrong. Spinnakers vary in design and fullness, so what is best for one may be quite wrong for another. Try many wind angles and rigs until you find what she likes.
  3. Learn both inside and outside jibes. Read up.
  4. Don't sail with one sheet (lower to jibe). That's lame.
Boats with better trim go faster with less heel, are lighter on the tiller, track straighter, and handle better and more safely when things kick up. Learning to sail a boat to the limits of its capabilities is key when lee shores and capsize threaten. A faster sailor can be a safer sailor.

----

I don't always care about speed. Some days I'll just drift around, not much caring. That's good too.

Sunday, August 24, 2014

I Have No Words....

There is a large bay window in the side of the building to facilitate viewing. It's a small town, so perhaps folks "drive through" just to see if it's someone they know.

... but can I get a chocolate shake while I'm in line?

Wednesday, August 20, 2014

Nine Days of Family Fun

8-8-2014
Deale, MD to Slaughter Creek.

My favorite wetland kayaking destination, this trip the goal was to introduce my wife to the quiet maze that is The Broads of Slaughter Creek. Part of the Taylor's Island Wildlife Refuge, it combines with the Blackwater refuge to form one of the largest natural areas on the east coast, and certainly one of the largest contiguous marshes. I've posted more on the area here.

James Island, leaving Slaughter Creek. Numerous immature eagles roosting.


We used the tender to tow our kayaks deep into the maze. My wife was first to spot the circling bald eagles (3 at one sighting!) and later, a periwinkle fight (sort of like Battleship, waged over the top of a small humacks from kayaks) between me and my daughter. I think the bald eagles were the highlight.

A quiet night on the hook. I've come to like the Mantus chain hook; the new plastic keeper makes it a fast one-hand operation with absolute security. In fact, I'm still using the 3-D printed prototype Mantus sent me for testing.



8-9-2014
Slaughter Creek to Smith Island

Fishing. After several hours of unproductive trolling, I caught a nice snapper blue while I was reeling in. A nice surprise. A bit of a jolt when you are sure that you are winding in slack line... but then again, that has happened to me several times; I'm reeling in, done fishing, only to get smacked by a 20-pound rockfish when I least expect it.

Not a trophy, but in truth, the small ones taste best. Perfect size for the pan.

Eating. The highlight of Smith Island may be the crab cakes at Ruke's. No exaggeration, and without any reservation, they are the finest anywhere, including 5-star restaurants. They simply melt in your mouth, exploding with flavor. Wish I knew the secret, though I suspect minimal filler (they tend to fall apart) and very fresh crabs are key. Worth the trip, just for that.

 Not fancy, and a bit run-down on the outside, but oh my....

Kayaking. You could spend a week exploring the Smith Island complex and never see most of it. We spent 2 nights and enjoyed as what as we could, paddling different areas than those we have explored before. Swan island is nice, just north of the western entrance channel. There is also a dredge spoil island on the south side of the western entrance that is home to thousands of gulls. Goat island --just across the harbor--is filled with feral goats.

Goat Island. There are perhaps 40 on the island, always climbing trees, for instinctual reasons, we suppose.


Can't let a jetty stop you. Up and over.
 

Impossibly low freeboard on the flats boats. Much of the crabbing and clamming water is very thin.

 They say you should name the boat for your daughter rather than your wife, since the former is a permanent relationship, the later less certain. I'm guessing this was named for the daughter.



Found this on the beach. After a little research we determined it is a Loggerhead sea turtle rib. Though I've never seen a live one in Chesapeake or nearby coastal waters, we've found eggs and carapaces. They are threatened, but not truly rare.





8-11-2014
Smith Island to Tangier Island.

Tacks included, perhaps 20 miles of bashing into steep chop and 20 knots winds. Tacking though 100 degrees, boat speed cycled between 8.5 knots on the flat bits and 5 knots when the beam buried in a steep set, sending green water all the way to the cockpit, averaging 6.7 knots dock-to-dock, including time spent untangling a crab pot from the rudder--hard to see those buggers in the conditions.

More fishing. I think the cats got most of the minnows.

One of our favorite places for just doing nothing, we still manage to keep busy.
  • The fishing off the dock is reasonable. A flounder, several sea bass, and some spot.
  • Crabbing. This time we focused on soft shells; harder to find, but more eating per crab. I'm not convinced they are as sweat, though.
  • Swimming. The nicest swimming beach on the Bay is the hook.
  • The Homecoming. Each summer they have a festival where family from all over returns to the island. Only inflatable "rides" (they've got to come by boat) but good music and good food.
  •  Local dining. The Fishermans' Corner is very good, and Four Brothers has a mean crab melt.
The claws aren't much of the threat when they're soft.


The Homecoming Festival sets up on the airport flight line, a short walk from the marina. The whole town is there, often more than 200 golf carts! Sure, as a visitor you are not a part of the family, but that doesn't matter. $5 admission and good music.


 8-17-2014
Tangier to Solmons Island.

Uneventful light air sailing. Caught 2 more snapper blues on the way, which added to the interest.

The Tiki Bar is the local muscle boat hang-out, worth a few minutes just for the people watching and the music. Anchor further away, though, up mill creek. Be aware of the cable area.

8-18-2014
Solomons Island to Deale

More uneventful light air sailing. An hour was spent on the beach at Calvert Cliffs, collecting fossils and enjoying the quiet, before the hikers reach the beach.

-----

Most of the meat in the fridge returned home with us; out catch matched our appetite, and some fish were distributed to my parents. We went out for steak that first night home, having reached our fill of seafood, at least for a time.

Friday, August 1, 2014

Eco-Trash

(I borrowed some of this from Windborne. It seemed important to share.)

I'm all about eco. I work for one of the largest recyclers, have built multiple re-cycling and recovery plants, and have invented new processes. But I'm not in favor of mis-labling or eco products that don't meet specifications or perform.

This is NOT mineral spirits.


 This is an emulsion blended to comply with west coast VOC rules. What it is good for, I have no idea.

If it were mineral spirits, it would comply with ASTM D235 (the defacto definition of the term), which it does not in many ways. Basically, FALSE LABELING.

Kleen Strip does make mineral spirits. They also make odorless mineral spirits, though plain or rule 66 mineral spirits are better solvents (the KB value of odorless MS, a measure of grease solvency, is only half that of regular and rule 66 solvents, which matches my experience). All of these meet ASTM specifications and can be used to thin paint and clean-up petrol based caulks and paints.
            
                                   Klean-Strip Mineral Spirits, Gallon

 ASTM D235, Type C, class C
* Petroleum-based.
* Clear, nearly water white (25 units is very nearly perfectly clear).
* Does not contain water (300F initial boiling point).







Monday, July 14, 2014

Why Does My Anchor Come up Backwards?

After fixing this on 3 boats (mine was the first) I thought I would share something so obvious it is commonly overlooked. It's embarrassing to even explain it.

 There are many things that can twist the anchor, not the least of which is a shift in the wind. The easy, or at least obvious solution, is a swivel, but failures are not unusual; my SS swivel had a nice interior crack that I only noticed when I took it apart to replace the anchor. Many sailors have abandoned swivels for this reason, and then wondered if they made a mistake when the anchor came up reversed most of the time. Never fear.

Notice the nice straight chain. No twist.

When connecting the anchor, observe that there are 4 rotation options. Unless you considered this at the time, you had only 1 chance in 4 of getting it right.
  • If you are 180 degrees out of alignment, reattach the shackle, inverted.
  • If you are 90 degrees out of alignment, either add a shackle or trim one link.
The chain cannot rotate in the gypsy, thus, getting the twist right significantly improves the odds of the anchor coming up right way round, more so if the windlass is near the roller. Not 100% certain, but it will greatly improve the odds.

---

One other thing that helps. for that last half turn; go very slowly astern while pulling it up the last few feet. The speed of drift may be enough. Most modern anchor will naturally rotate to  face the current at just a fraction of a knot. Handy, since the boat will start to slide back as soon as the anchor clears the bottom anyway.

---

Why would you add an extra shackle? Because with G43 and higher chain, the size that will fit the anchor well and the size that will fit the chain may not be the same. Place the larger shackle with the bow in the slot (the attachment slot is designed to clear the pin bosses) and the smaller shackle with the pin (largest that will fit) through the last link. Nice and flexible, minimal side loading of shackles, which they hate.

Tuesday, July 8, 2014

Use It Up, Wear It Out, Make It Do, or Do Without

I think these are done. West Marine, don't last too well, but I like the fit best and I have tried many.



From later that evening; un-named cove, far up Harris Creek. Even on July 5th, a narrow and unmarked entrance keeps this place private.



Sharp's Island Light. The winter ice pushed it many years ago. It is no longer an active ATN.


Just a nice over-night cruise, me and the wife. A nice breeze and no unpleasant surprises... other than forgetting to fill the tender gas tank. But we weren't far. And no jellyfish yet, not where I've been, the up-side of a brutal winter.

Friday, June 13, 2014

Catamaran Slip for Cheap in Deale

 



Why catamaran? There's only about 5' of water and about 3.5 at extreme low tide (soft mud bottom). But there is room for 16' beam.


The previous boat was a Gemini.

Phipps Marina
Calvin Phipps
615 Phipps Road
Deale, MD 20751

410-867-0299

An earlier post has additional detail.

Monday, June 2, 2014

Drinking Water Filtration--The Short Version

rev. 6-21-2014 

(The LONG version was published in Practical Sailor in 4 parts in Spring 2015.)

The Problem. Marina water is basically untrustworthy. Either the well is brackish of the hoses are contaminated with algae growth. Either way, the water contains dirt and too much sulfur for pleasant consumption. In the midst of researching a 3-part article on water treatment and filtration for sailors I decided to apply what I'd learned to a simple up grade for Shoal Survivor. I'll explain a little--if you want the really long version,subscribe to Practical Sailor.

The Solution. The way I see it, there are 4 parts to the clean water quest:

Step 1. Filter the incoming water. Skip this step, even with potable water, and you will build solids in your tank. Pipe scale will shed, harmless bio-films in distribution piping will shed, and dockside hoses always grow algae. Build up solids on the tank floor, and disinfectants and the residual chlorine in the tap water can't reach the bugs underneath. Given time, biomass is food for bugs, the tank will be come gross. I've even seen lines plugged. My choice? First, run the water for a few minutes to run the junk out of the hose, perhaps rinsing off the dodger; it needs it anyway. After that, I like the Camco RV filters which simply screw on the end of the hose, $10 from Walmart. The marine store stuff is the same for 2-3 times the price. I put a 4" extension on the outlet so that it hangs easily in the fill pipe.

What about the fact that the carbon filter will remove the beneficial chlorine residual? Opinions vary, but ...
  • We've used these for 10 years and never built any biomass in the tank. If the tank stays clean and the carbon removes most organic material, their not much for the bug to eat.
  • The residual is not going to last more than 24 hours anyway, and...

 ... Based upon testing (mine), the hose end filters only remove about 10-20 % of the chlorine anyway. The flow rates are simply too great to give the residence time needed for effective removal. Honest, it's a hoax, but we're conditioned to buy carbon. A brief review of the certification documents will show that they only had to remove 25% of the chlorine to claim "removal,", and the test was often run at a reduced flow rate. Get some aquarium test tapes and run your own tests. You'll be stunned.



An even better solution is a 1 micron Baja water filter, featured in Practical Sailor. My invention, you're going to love it. Perfect for tap water, rainwater or jerry can water.

    (And don't EVER put glycol in your tank to winterize. It will ferment, it will smell, and there is more than enough food to clog lines. Empty the tank and dry it. the glycol goes ONLY in the pipes. In the pipes it must be installed at sufficient concentration to serve as a biostat (pH >9, >25% glycol). If the winterizing solution pH is less than 9, add a touch of borax to bring it up. the result will be an effective sterilizing solution and little or not need for spring cleaning.

    Step 2. Disinfect the tank.  About 1 teaspoon per 50 gallons is enough to refresh the residual for good water. Better yet, try Aqua Mega Tabs; really convenient and because they are based on dichlorisocyanurinate, the chlorine residual lasts weeks instead of days, keeping the thank fresh. Tip: use 1/4 to 1/2 the recommended dose, as they are rather conservative. Use aquarium test tapes to test for residual (0.1-1.0 ppm).


    Step 3. Secure the tank vent. Plumbing codes required a 16-mesh screen and a down turn protected from dust, but many boat builders just leave an open pipe--PDQ did. If you look closely, every so often there will be stink bug doing the back stroke or the bones of some no-see-ums on the floor, decomposing. And while your about it, make certain that seawater can't find its way in. Secure the vent.)

    Step 4. Filter the water prior to the tap. Even if you have followed all of the forgoing, something could have gotten past and the bleach will dissipate in a few days.

    Just how big are microbes we are trying to exclude?

    Organisms Size range (μm) Example (size in μm)
    Cysts (NSF 53 filters                                     4-14                                     Cryptosporimium  (4-8)




    Prokaryotes
    Bacterium: typical rod 1.0-0.5 x 1.0-10 Pseudomonas aeruginosa (1.5 x 0.5)
    Bacterium: typical sphere 1.0 diameter Bacillus megaterium (7.6 x 2.4)
    Eukaryotes
    Fungi: filamentous
    Red Tide
    8-15 x 4-8
    5-75
    Mucor hiemalis (8 diameter)
    (disolved toxins may be present in red tide)
    Fungi: yeast cell Saccharomyces cerevisiae (29-49.1 μm3)
    Alga 28-32 x 8-12 Chlamydomonas
    Viruses (NSF P231 filters)

    Virus 0.015 x 0.3 Poliovirus (0.03 x 0.03)
    Tobacco mosaic (0.02 x 0.3)
    While cysts, fungi, algae and some bacterium can be filtered out with mechanical filters, viruses require either adsorption mechanisms which are hard to define and fade as the cartridge is spent, or membrane filtration (RO through ultra filter). Several carbon block filters have been upgraded with a membrane on the inside, achieving NSF P231 approval (microbial barrier, tested with real bugs to block everything).

    How are nominal and absolute filtration performance defined? There is no agreed upon standard, but generally speaking, nominal filtration requires 70-98% retention and absolute filtration requires >98% retention of inert test particles.

    I could install UV sterilizers (too much power) or an RO system (they waste about 4 gallons for every gallon produced and they leak bacteria anyway), but I'm not nearly that paranoid. I've had no filter on the boat for many years, and I drank out of some real mud puddles in my backpacking days without ill effect.

    I could install the Seagull filter($600-$1000 for a filter--they are completely out of touch with the market) or the equally effective Microguard by Pentek ($129 complete), or better yet, the Pentek DVG-50 (NSF P 231 certified, $131 complete), which are based upon less expensive standardized parts. Both are well tested and rated to remove cysts, bacteria, and viruses. The Seagull filter just costs more. But US coastal sailors don't need either.

    My choice? In the US, water treatment and on-boat chlorination are very effective on bacteria and viruses. However, some protezoa and cysts can sneak by, resisting chlorine treatment. These are all we really need to remove at the tap. I like carbon block filters, available in 0.5 micron nominal filtration (Pentek  Slimline or G3 housing with 2x10 CBC-10 or Floplus 10) . They will easily stop of protozoa and cysts (NSF 53 certified filters are rated for this), >98% of the bacteria, and >90% of the viruses. True, viruses are smaller than 0.5 microns, but many are attracted to the carbon surface by electrostatic forces, just as other chemicals are adsorbed. Many bacteria and viruses are attached to larger particles and are removed in that way. Although removals vary according the referenced data source, by the combined mechanisms the reduction is still material. WHO has documented 98.5% reduction of bacteria and 88% reduction or viruses by simple sand filters--a depth filter with similar mechanisms and much larger pore size**.  Granted, it may only take one organism to infect you--I'd worry about that traveling in some areas--but not in the US. This little miracle is only $25 including the housing and replacement cartridges are available through many sources. The time to install? About 15 minutes.

    We later switched to a 10" filter to get more flow--the Pentek CBC-5 in the photo was OK for drinking, but slow when filling pots and washing dishes. We switched to the Pentek Floplus-10, which is NSF 53 certified for cyst removal and does not restrict flow. The longer housing hangs closer to the floor, but only about 1-inch is required for removal, which can be done without spilling a drop.

    (A note to PDQ Altair owners: that big grey carbon-reinforced beam crossing the forward end of the salon bench is the mast compression beam. Do not drill holes in the flange.)



     This universal housing in the photo is from Pentek (158203) was $11, the 0.5 micron carbon block cartridge (2 x 5 standard, Pentek CBC-5) was $10, and the fittings were left behind in a bag by the previous owner. It does reduce the flow at 30-40 psi (standard for boats) from a thunderous 4 gpm that splashed all over, to a somewhat slow 0.7 gpm, about like the refrigerator dispenser at home. It would certainly be suitable for smaller boats.

    I later upgraded to a Pentek G3 2x10 housing and a Floplus 10 cartridge, with about 4 times the flow; all I can use without splashing. I did not filter water for showers; pre-filtered and chlorinated US tap water is more than adequate. Do place any filter on the pressure side of the pump; the pump will cavitate trying to draw through a carbon block or any other fine filter media. I've had the same cartridge for 2 years, allowing it to dry out each winter in the off season and then re-installing. I'm very pleased with it.

    The Result. When finished we did a blind taste test with 5 sailors along the dock; not one could distinguish the tap water from Deer Park bottled water (based upon mineral content analysis, the two waters are very similar). For the coastal US sailor, we have improved the taste as far as possible, and reduced the biological risk by at least 3 orders of magnitude. I feel I've reached beyond the point of diminishing returns clear to the point of no return.

    I'm sure I've save the price of bottled water, and the reduction in hauling and trash has been wonderful.

    Saturday, May 31, 2014

    RO Water--What Are We Missing

     (This is a work in progress. I'll be back)

    There's been a lot of talk on the web about distilled water and RO water being bad for you, leaching minerals from the body, cause heart disease and all that. Although we filter out most of what we read in the tabloid press and web, perhaps there is a kernel of truth, hear and there, accidentally, it seems. As I begin researching drinking water filtration for a serice of up-coming articles, I find there is substance to to concern over the lack of substance in pure water. While I'm not a health researcher, there is enough scholarly work out there by respected organizations to take seriously. I like reading things from the World Health Organization (WHO).

    WHO Symposium on Low-mineral water.
    WHO paper.

    Please read these at length. Google strings with "drinking water," magnesium," and "calcium." Try to read between the fluff and ignore all sites that are selling something.

    There are many concerns; the three that seem best supported by science are:
    • Heart Disease. A shortage of magnesium is well correlated with certain forms. Also stroke.
    • Kidney Stones. It seems that dietary supplements increase risk, while calcium in the water decreases the risk. Different absorption mechanism.
    • Heavy Metal Absorption. If there is enough calcium in the system it out-competes many toxic materials. In fact, precipitation with lime is the basic industrial treatment for most heavy metals.
    It seems all of that traditional stuff about healthful mineral waters had substance. Funny how that happens. Funny how your parents get smarter over the years.

    What does this mean to the sailor?
     

    Even though single-stage RO water (typical sailboat water maker) is not ultra low in Ca or Mg, it is considerably lower than most surface waters and lower than the general guidance available to us. I'm not sure what this means at a practical level. If you swim enough swallow a few mouthfuls of seawater, that's actually a good thing (a few percent seawater will solve the problem). Bottled water helps. Supplements may, but a dash of seawater in the cooking is simpler!

    For coastal sailors I think the message is clear; using dock water with some on-board treatment (I'm researching that) is a better bet than running a water maker.