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This schematic shows the basic components of a reverse-osmosis watermaker. In practice, the devices may be much more complex. Some models, for example, use the pressure of the exiting brine to assist the high-pressure pump, thus conserving energy.

Pressing pure water out of the sea Issue 77 : Mar/Apr 2011 Osmosis is a natural process in which molecules of a liquid spontaneously pass through a semi-permeable membrane. The direction of fl ow acro...

Jerry prods his jug bucket to perform in front of the camera.

Thinking beyond the pail Issue 78 : May/Jun 2011 Aboard Mystic the “ship’s bucket” is an important piece of gear. When it’s inactive, it holds the vacuum cleaner and is buried deep in the port cockpit...

A small outlay in materials and a few hours of labor brought Ken a gas locker that turns heads wherever he sails.

A propane locker that won’t blow the budget Issue 78 : May/Jun 2011 A standard propane locker from a marine catalog seemed ridiculously expensive ($650 or more) when I was refurbishing my Cape Dory 27...

Danny built Olo’s radar tower, at left, from readily available aluminum plate and tubing, below and illustration on facing page. He sets the angle of the radar manually by adjusting a turnbuckle, on facing page.

A home-built tower with manumatic leveler Issue 78 : May/Jun 2011 Several years ago, my wife, Kari, and I decided to venture beyond the relative safety of our normal cruising grounds in the Apostle Is...

Carl’s weighted halyard messenger begins with a figure-eight knot tied several inches from the end of the line, at top. He then threads steel nuts onto the messenger line to create a weight flexible enough to pass over a sheave, at middle and above. Another knot tied at the end of the messenger keeps the nuts from falling off.

A not-so-nutty way to send a messenger Issue 80 : Sept/Oct 2011 You say you lost an internal halyard? You’re scratching your head over how to reeve a messenger with which to pull through a replacement...

Gregg’s neighbor, attuned to tradition, suggested a way to clean vinyl fenders: water-soluble brush cleaner, at left above. It works, at right above.

Old-world wisdom helps restore white vinyl Issue 81 : Nov/Dec 2011 An article of mine entitled “Simply Clean” appeared in the May 2004 issue of Good Old Boat. It detailed recipes for more than two doz...

A self-draining anchor locker is a ready-made location for a quick-and-easy storage container for propane canisters.

A convenient container for small canisters Issue 81 : Nov/Dec 2011 If you have an anchor locker with a drain, here’s an easy way to store those 1-pound propane tanks used for barbecue grills. Buy a le...

With his combination of clamps, Dave was able to put the squeeze on three edges of the table leaf.

A woodworker sometimes has to extemporize Issue 83: March/April 2012 We have all wished at times that we had three hands. When tackling boat projects, however, it seems that what we need more of isn’t...

Joe bought a used instrument pod but couldn’t use its faceplate . . .

A new faceplate accommodates new gadgets Issue 82 : Jan/Feb 2012 After more than 25 years sailing, I decided it was time to get an autopilot for Unicorn, our Catalina 30. When it came to installing th...

Larry’s new turnbuckle boot, on the left, is barely distinguishable from an original. It’s slightly larger in diameter.

A home-store commodity fit the bill Issue 85 : Jul/Aug 2012 Turnbuckle boots last a long time, but not forever. Cracked and broken, mine were showing their age. I needed six boots 1 1/2 inches in diam...

To fasten his rigging to the mast for trailering his boat, Allen passes the bungee loop around the mast and through itself, then forms a smaller loop to hold the rigging (visualize a figure eight). the finished tie-up holds the rigging away from the mast and reduces chafe.

Make them the right length for any job Issue 85 : Jul/Aug 2012 Bungees of the “loop and ball” type are very handy around sailboats. I needed some larger than those commercially available for tying up ...

In July 2010, floating behind Cormorant at anchor in Paros, Greece, the dinghy still looks great.

An easy-to-make cover protects an inflatable dinghy Issue 86: Sept/Oct 2012 Take a look at inflatable dinghies clustered around a dock or sitting on the beach in a cruising area. Almost all of them wi...

David’s water “tank” makes practical use of an otherwise dead space in the galley.

Simplifying the water supply led to galley efficiencies Issue 88 : Jan/Feb 2013 Our 1976 Tanzer 26 served us very well for several years as a cruising boat on Lake Winnipeg in Manitoba, but on such a ...

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