Systems & Propulsion

Installing a lightning protection system is not a particularly simple task, however. ABYC standard E-4 gives four pages of instructions on the installation of lightning protection. Even with the Dynarod kit, you have to provide all the connections to create a short, direct path to ground. You must also, by the ABYC standard, tie all major metal masses in the boat - engine, tanks, stoves, for example - to the lightning protection system.

Among the more neglected pieces of gear aboard most boats are the primary storage batteries, which faithfully crank the engine and light the lights. In the case of the typical lead-acid battery, even benign neglect is tantamount to abuse. It’s small wonder that many battery manufacturers refuse to recognize the warranty on batteries used aboard boats. The normal marine battery cycling - relatively high discharge rates with no charging, followed by rapid charging at a high rate by high-output alternators - is murder on conventional automotive batteries, and not exactly a piece of cake even for deep cycle batteries, constructed to absorb this type of abuse.

If the weather this time of the year is cold enough for you to give up sailing for a few months and curl up in a warm place, there’s a good chance that the electronic equipment on your boat would appreciate a little of the same treatment. A little extra care when the weather is cold can add considerably to the useful life of most electronics. Unless a piece of gear is totally sealed against the environment, the atmosphere on the inside of the unit will be pretty much the same as the atmosphere on the inside of the rest of the boat. In the middle of winter, this can mean a lot of cold and condensation. Needless to say, condensation on the inside of your delicate electronics is not the best atmosphere for long life.

If the weather this time of the year is cold enough for you to give up sailing for a few months and curl up in a warm place, there’s a good chance that the electronic equipment on your boat would appreciate a little of the same treatment. A little extra care when the weather is cold can add considerably to the useful life of most electronics. Unless a piece of gear is totally sealed against the environment, the atmosphere on the inside of the unit will be pretty much the same as the atmosphere on the inside of the rest of the boat. In the middle of winter, this can mean a lot of cold and condensation. Needless to say, condensation on the inside of your delicate electronics is not the best atmosphere for long life.

The battery is the heart of a boat’s 12-volt electrical system. In it, a chemical reaction maintains a potential difference or voltage, which “pumps” or pushes electrons around whichever circuits are switched on or are “closed.” No charges should flow through an “open” or incomplete circuit; if they do, you’ve got a problem, which we’ll get to later. The storage battery’s chemical reaction is reversible, which means that it can be recharged, and will be continuously, as long as the engine is running and the alternator or generator is functioning properly.

The battery is the heart of a boat’s 12-volt electrical system. In it, a chemical reaction maintains a potential difference or voltage, which “pumps” or pushes electrons around whichever circuits are switched on or are “closed.” No charges should flow through an “open” or incomplete circuit; if they do, you’ve got a problem, which we’ll get to later. The storage battery’s chemical reaction is reversible, which means that it can be recharged, and will be continuously, as long as the engine is running and the alternator or generator is functioning properly.

This month’s Gear Graveyard called to mind the famous scene in the movie The Graduate when actor Dustin Hoffman is pulled aside at a dinner party and offered a word of advice: "I just want to say one word to you son . . . just one word . . . plastics." There are a myriad of polymer combinations that make up the vast realm we call plastics, so to speak of them in a general sense can be misleading. Some plastics, like the glass-fiber reinforced acetal copolymers used in a variety of marine hardware are extremely strong.

When it comes to the development of electric drive systems large and small, there’s a double-headed challenge. The first is the propulsion system itself, a combination of electric motor and drive train that efficiently turns watts into speed through the water. The second part is the acquisition of power to run the motor. Electric propulsion, in our opinion, is a good fit for daysailors and marina-to-marina cruisers, so we tested a few options available to recreational boaters looking for an electric outboard: the Torqeedo T-801, which we previously reviewed; the new Torqeedo T-1003, a beefier iteration of the T-801; and the Electric Paddle, a less-expensive option.

There are a variety of wire types that exceed government and industry standards for onboard wiring. Because these types of wire can be 10- to 15-percent less expensive than high-quality boat cable, Practical Sailor wanted to determine whether any of these other options would be acceptable for the cost-conscious sailor.Using a moisture chamber designed to mimic years of use in a harsh marine environment such as a bilge, PS's test focuses on the durability of tinned wire, non-tinned wire, and various wire connectors. It also examines whether using a corrosion-inhibiting product could help extend the life of these wires and connections. The test led to some definitive conclusions on which wire types are best in specific onboard uses, and also showed that long-term wire protection begins with well-sealed connections. Our July 2010 issue reported the six-month results, and here, we offer the one-year update.

Letters to the Practical Sailor editors in December 2010 include: paint colors, sailmaker services, bilge pumps, pest control and the Wirie v. a DIY WiFi antenna.