Testing VHF Coaxial

The loss in RF coaxial cable increases substantially and quickly, when there is water intrusion. Coax that uses foam dielectric, like RG8X and LMR type coax, is particularly prone to this problem because the water can quickly propagate along the foam dielectric used in these type coaxes.

Practical Sailor Tests 4-horsepower Electric Outboard

As we did with the Torqeedo electric outboard and Minn Kota trolling motor in past tests, Practical Sailor put the Solid Nav Traveler to work in sea trials on a Cape Dory Typhoon to determine whether it was a viable replacement for a small boats gas-powered outboard. The four-horsepower Traveler electric motor is marketed by Solid Nav and manufactured by Suzhou Parsun Power Machine Co., Chinas largest outboard exporter. Using a brushless 48-volt DC motor made by Mars Electrical Co. of Milwaukee, Wis., the Traveler combines a familiar drive train and an innovative solid magnet electric motor. At first glance, it looks like a small conventional outboard. Available in both long-shaft (20 inches) and short-shaft (15 inches) models, the Traveler is a gasoline outboard alternative best suited for a pocket cruiser (like a Cal 25) or similarly sized weekend cruiser where electric propulsion is desired. However, its required battery entourage limits its portability and affordability, and charging needs limit its practical use on smaller boats.

Antenna Gain and VHF Transmission Range

Recreational marine VHF antennas are usually broken down into three categories: 3- and 4-foot sailboat antennas (3dB gain), 8-foot powerboat antennas (6 dB gain) and 16-plus-foot, long-stick antennas (9+ dB gain) that are popular on larger, long-range craft. Antenna gain is a ratio related to an antennas effective radiated power (ERP) instead of a fixed quantitative value.

Mailport: 12/06

MARINE INSURANCE REDUXI have been reading with much interest your articles about marine insurance this year (April and May 2006).

Sailing Gifts for 2018

No one really wants just practical gifts, so weve tried to locate a few items that go beyond pure utility for this holiday season.

12-Volt Booster Packs

Wal-Mart's EverStart booster delivers a lot of cold cranking amps for the money, but lacks a light. The versatile Xantrex Powerpack 300 Plus, is a do-it-all booster and a good choice for smaller boats.

Keeping the Shorepower System Safe

One of the often overlooked maintenance items in the pre-season rush to the water is the AC shorepower system. Over the years of surveying, Ive amassed a small collection of scary photos from past surveys showing the common examples of neglect to this critical system.

Breaker Panels

Blue Sea gives the old vets, PanelTronics and Marinetics, a run for their money, and wins on the website front. Tech support for do-it-yourselfers is key.

Solar Panel Sense

Movies can be corny, but Jack Sparrow nicely summarized the romance of sailing: Thats what a ship is, you know. Its not just a keel and a hull and a deck and sails, thats what a ship needs but what a ship is ... what the Black Pearl really is... is freedom.

Keeping Your Cool With A/C

Part 2—What’s new with refrigerants and controls.

Hot Water Heater Installation Tips

To keep pipe joints from leaking, use Teflon tape or pipe joint compound, and remember that hose barb-to-hose connections are much easier to make drip-proof with a hose clamp than the same connection made on a threaded pipe stub.