How to Measure Boat Humidity: Psychrometric Charts Do It Right

Insulation is a greater energy-saving expedient; if our heater or air conditioner is undersized, fixing drafts, shading or insulating windows, and insulating non-cored laminate are all ways to reduce the thermal load. For boaters, however, that is only half of the equation.

The Rain Catchers Guide

An efficient, clean rainwater catchment isn't just for cruisers venturing into remote areas. While biologically safe, many areas of the U.S. are served by well water that is not chlorinated, high in sulfate that makes it prone to going bad. When stored in the absence of oxygen, the sulfate becomes the preferred oxygen source for microorganisms and hydrogen sulfide is the byproduct. Only .05 parts per million (ppm) sulfide is required to make water distasteful. Even if the water at your next marina is fresh and sweet, filling from an unfamiliar source is always a roll of the dice.

Simple Steps Will Keep Salt Out of the System

Depending on the collection area and the sailing, salt can be a primary problem. Spray falls and dries, layer after layer, until the decks hold enough salt to foul a considerable flow of water. The solution? Wash the deck with seawater before the rain comes. Squeegee off as much as practical or towel dry, and common sense dictates this is best done when at sea and must be done away from red tides. We tested the run-off from the top after scrubbing with seawater, allowing to dry, and then spraying with tap water equivalent to 1/10-inch of rain (see results in table below). In addition to taste, seawater contains significan't sulfate levels, which combined with bacteria in the tank under anaerobic conditions, can lead to sulfurous water; sailors notice this when a seawater flush is used for the head, but allowed to become stagnant for a few days; the first flush will smell.

Winterizing Wisdom from the Chemistry Lab

Each winter sailors must tackle the project of winterizing their potable water system. Our preferred method is to dry the system completely (see PS September 2014, Step-by-Step Winterizing tips. If thats not possible we completely empty the tank and then treat the plumbing with the correct concentration of anti-freeze. The online version of this article provides all the details you need to carry out this process, as does the recent Inside Practical Sailor blog post, The (Cold) Case of the Frozen Anti-freeze.

Heating Equipment Support Warms Our Heart

Three and a half years ago I had a Hurricane hydronic heater installed on our 1969 Grand Banks 32, Athena. Compared to our prior hydronic heater from Espar, I have been exceedingly pleased with the Hurricane. It has been completely reliable and it is very easy to service. Recently though, after the unit was out of warranty, the fuel pump failed after 300 hours of use. The Hurricane technician who replaced the failed fuel pump indicated that normally the fuel pumps last much longer, generally 3,000 to 5,000 hours.

Folding Cart Does Yeomans Duty

In our previous review of dock carts, folding file carts were a standout. Marina carts are a hike to retrieve and return, where as the folding carts can be packed into a space no larger than a brief case in 5-10 seconds, fitting handily in the truck or in a locker. The downside is limited capacity (15 x 13.5 x 14 inches deep and light construction, bordering on flimsy. Prices start at about from $22. Are the trade-offs worth it?

Top Fire Blankets for the Offshore Sailor

Fire extinguishers are a U.S. Coast Guard requirement, and every boating instruction manual starts by telling you how many you need, where to mount them, and how to use them. Unfortunately, the manuals never go beyond that simplistic guidance, even though most fire-prevention authorities agree they are often not the best first response.

Onboard Fire Fighting

When a fire strikes at sea, you need to respond quickly, aggressively, and with a cool head, and you will not give up easily. At some point it is going to be prudent to leave the boat; serious burns will make survival in a raft difficult and gasoline and propane can explode. If the fire is well developed or started with an explosion, there may be time only for a quick Mayday call and to abandon ship.

Refitting After 200,000 Miles

I never dreamed GPS navigation would be so easy from my days of plastic sextant, Zenith TransOceanic radio and a Timex watch. Gone are the frustrating days of waiting hours for a break in overcast skies to take a sextant shot. While on ocean passages we continually run a small Garmin fixed-mount GPS under the hard dodger, carry paper charts for everywhere we sail, and plot our position every three to six hours on a small-scale paper chart.

Reassessing Clip-in Location Points

Like the automobile safety belt, the various components that keep sailors from separating from their boat (the harness, tether, and jackline) have gone through significan't changes over the years. If you search the Practical Sailor website under these topics, youll find a number of reports on the recent changes in this equipment. One element, however, that has not addressed in great depth is the proper placement of jacklines (also called jackstays).

The Ins and Outs of Aftermarket Bowsprits for Light-air Sails

A salty Kiwi named Ross Norgrove once said that the most important tool for the owner of a wooden yawl adorned with a bowsprit is a sharp ax. To some degree, his witty comment holds true for contemporary sailors contemplating a mini-bowsprit.