Marine Electronics

The Delorme Earthmate PN-40 is one of the newest additions to the handheld marine electronics market. Practical Sailor evaluated the rugged, palm-sized Earthmate using the same tests used in past GPS evaluations to see how it matched up against the Garmin GPSMap 76CSx, our top performer in past tests. Testers used the unit for multiple days and rated key functions, battery life, lighting, waterproof quality, cold starts in multiple locations, and visibility under different conditions.

Offshore sailor Skip Allan tested two entry-level tillerpilots, the Simrad TP10 and Raymarine ST1000, aboard his 27-foot sloop during last years Singlehanded Trans-Pac race. The autopilots were used during varying weather conditions and sea states, including gale conditions. The review considers characteristics of the Raymarine tillerpilot and Simrad tillerpilot, including price, power supply, drive thrust, installation ease, user friendliness, construction, and performance.

Being able to communicate with a hands-free communication device along the length of the deck allows crew to coordinate activities like anchoring, docking, and going up the mast. Practical Sailor testers experimented with two systems: Motorola SX800R two-way radios and Nautic Devices Yapalong 3000. Both the Motorola and the Yapalong comprise a cell-phone-sized transmitter/radio unit and a separate handset. We tested them during anchoring, masthead repairs, and docking. The products were used with their mated headsets in various weather and sea conditions, including light rain and spray. The Motorola unit also was tested with a compatible Fire Fox Sportsman Throat Mic.

As sailors, wind energy is at the forefront of our lives. The Practical Sailor wind generator test in March 2007 included a prototype of the Air Breeze from Southwest Windpower. Last year, the company debuted the Air Breeze in the alternative energy market for recreational boaters; it is distributed through retail giant West Marine. Using the same criteria as our 2007 test, Practical Sailor tested the Air Breeze for several months under a variety of conditions, using it to charge the ships batteries aboard a Union 36. The wind generators body is cast aluminum, and its blades are made of glass-filled polypropylene. Testers found it quiet, easy to mount, and reasonably priced at $900.

In light of your recent letters on copper/epoxy antifouling bottom coatings, Id like to share my experience. Near the end of my Searunner trimaran boatbuilding project, I decided to apply a product known at the time as Copperpoxy. I applied the coating to all three hulls to about 20 mils thick, and then sanded this "orange peel" surface down to about 10 mils. I finished up with 220-grit sandpaper. In the end, it was beautiful. It was just like a perfectly smooth, new copper penny, and just a bit thicker than recommended. We started our cruising adventure in the foul waters of Beaufort, S.C. Very soon, I was doing a huge scrape job every week. The bottom was covered with grape-size barnacles. I noticed that the aft half of the main hull, the part with underwater metals, was fouling the worst. (I was changing zincs every week.) Two years later, in Pensacola, Fla., we decided to give up on this product and paint over it with Pettit Trinidad SR bottom paint. When doing the weeks-long prep for this painting, we could see that the skin of our epoxy/ply boat was electrically conductive and corroding all the way through in the entire area of the bonded shaft, strut, prop, gudgeons, and copper mast ground. We put on three coats of Trinidad, waited a few days, and splashed the boat. Within two weeks, the new paint had peeled off in the electrically active area. We re-hauled, stripped the paint in this area, and coated the problem Copperpoxy area with three coats of epoxy. After sanding and repainting, we set off for the Western Caribbean. Over the following six months, we noticed that even the epoxy would not stick to the Copperpoxy.

I’m a member of the Stonington Harbor Yacht Club in Stonington, Conn., and we need a better way to contact members on the water. We would like to use the full features of DSC (Digital Selective Calling) group calling for that purpose, but it is not clear to us what the best way is to obtain a group identity call number for DSC calls.

While world leaders and presumed financial wizards set to work trying to right the global economy with some very expensive bailers and sponges, Practical Sailor has taken the time this month to dig through our recent collection of Chandlery submissions to see if we can find anything more useful. Given sailors capacities for innovation (aka "jury rigging"), were holding out hope that the next great invention-the ultimate stimulus package-lies somewhere in our growing stockpile of Chandlery items.

As a follow up to Practical Sailors recent marine electronics report on mid-priced VHF radios, we evaluated three entry-level fixed-mount VHFs and three entry-level handheld VHFs priced at about $100. Marine radios in this price range lack some of the bells-and-whistles and safety features of higher-priced VHFs, but they will suit the needs of sailors on a budget or boaters looking for a backup VHF. The three fixed VHF radios tested were Cobra Marine F55, the Midland Regatta I and the Standard Horizon Eclipse GX1000S. Handheld radios tested were the Cobra MR HH325 VP, Midland Nautico NT3, and West Marine VHF55. Testers evaluated each radios transmitter, receiver, sound quality, display screen, and water resistance. Radio performance was also tested at extreme temperatures, and handheld models were dropped from 4 feet onto a concrete surface.

Compliance is signaling in restricted visibility. This is why we became interested in Signal Mate and its approach to automating sound and light signaling, a big plus for short-handed sailors. The companys console-mount controller and its portable emergency signaling kit offer great capability and quite a bit more. The easy-to-operate push-button console actuates digital switching circuitry that controls light, and sound signals are pre-programmed to indicate anchoring and making way in low visibility, as well as designating emergency and distress situations. Theres also a capacity to manually control the signaling process, and to select sound, light, or both as signaling options. The unit can connect to the boat horn or other audible device or can be wired to a mast-mounted maneuvering light.

Practical Sailor finds the Alado Nautica headsail furler to be easy to install and a worthwhile sail-handling tool. One feature that sets the Alado apart from other jib or genoa furlers is its staggered slotting of five-foot foil sections that slide together and interlock over a conventional wire or rod headstay. This design allows the do-it-yourselfer to fit each foil section over an attached headstay, and simply push the formed furler up the wire or rod. Mainstream headsail furlers tend to be assembled on the ground and installed with the mast horizontal. The Alado furlers design uses integral halyards to place a compression load on the foil, eliminating the need for Loctite, set screws, and a top swivel. We tested the Alado over five months of coastal cruising and daysailing.