Boat Maintenance

Letters to Practical Sailor, June 2011. This month's letters cover subjects such as: Precision Boat Works, Groco, and More!

Although the ease and convenience of electronic chartplotters has ensured their place aboard most every vessel these days, the punch-and-go navigation that makes them so popular has also spawned a generation of slack-jawed zombies when it comes to even the most rudimentary of navigational skills. Prudent mariners continue to carry paper charts, both as backup to chartplotters (and their “one diode away from disaster” nature) and to have the big picture view that a plotter just can’t match.

Do you have any suggestions on a book or manual that explains how to replace a cored deck where most of it is soaking wet? I replaced a 1.5-square-foot area and was surprised to see that it was so wet and rotten that I could grab the wood core and squeeze it like a sponge.

There was a time when laid decks — teak, yellow pine, or fir — were the hallmark of a true yacht. The bare wood gave secure footing, easy maintenance, and reasonable protection from leaks. Since the advent of fiberglass, those same laid decks, almost universally of teak, have con­tinued to represent that hallmark. However, they have become at least as much a cosmetic feature as a functional one. Teak decks, cockpit seats, cockpit sole, hatchtops, and cabin sole all lend themselves to being planked (or sheath­ed) in a traditional manner Almost no project can do more to "dress up" a boat than some laid decking, and it is a job the average boatowner can do himself. This article describes a simple method for laying decking, one we have used ourselves.

The modest mug, basic in shape and function, finds its way aboard all but the most elegant or the most rudimen­tary of vessels, because it is so useful. Equally at ease with soup or stew, cof­fee, tea, or chocolate, bread sticks, spoons, or even flowers, it serves faithfully in rough water and smooth. While almost universally carried aboard boats, the stowage of mugs varies as much as their uses. On some boats they rattle about in the galley sink, while in others they may be neatly nested in a drawer, hung from hooks, or (best of all) resting in proper racks.

Radios occupy an important place in the contemporary sailing scene, supplying weather reports, time ticks, entertainment, and news. High quali­ty radios are also expensive. In other words, they're valuable pieces of equipment and deserve to be pro­tected. One way of protecting a radio is to store it securely chocked in a locker. Unfortunately that means it must be taken out to be used — always a bother and limiting accessibility — and when in use it's vulnerable, since it is not secured as when stowed

Improperly mounted stanchion and pulpit bases are a major cause of gelcoat cracks in the deck radiating from the attached hardware. The cracks are usually the result of un­equally stressed mounting fastenings or inadequate underdeck distribution of hardware loads. Frequently, a boat is received from the builder with local cracks already developed. Once the deck gets dirty enough, these minute cracks start to show up as tiny spider webs slightly darker than the surrounding deck gelcoat While repairing these cracks is a fairly difficult cosmetic fix, the underlying problem — poor mount­ing — is fairly easy to correct in most cases.

It takes practice to produce a perfect, mirror finish on var­nished wood, but it is not so much a difficult task as an exacting one, where attention to detail and no short cuts are the secrets to success. Whether you are finishing new wood, refinishing old wood, or maintaining a finish in good condition, the basics are the same. Tools and materials required are sandpaper, vacuum cleaner or dusting brush, tack rag, brushes, and of course varnish and thinner If you are working from bare wood you may require stain or filler or a combination filler-stain. In cases where old wood has become discolored you will probably want to use a bleaching agent.

One of the most used and easily made items of safety gear on boats is the handrail. Rare is the boat which shouldn't have handrails along the major portion of either side of the cabin top, and also down the centerline of the deck. Belowdecks, handrails are also important for safety. They are usually mounted on the cabin over­head, parallel to and on either side of the boat's centerline. To simplify mounting, the most desirable posi­tion is under the rails on deck. That way a single set of bolts can serve to fasten both rails.

In light air, a major portion of the total resistance of a sailboat derives from skin friction. To oversimplify, the smoother the boat's "skin" — the submerged part of the vessel — the less power is required to drive it to a given speed. Put another way, given two boats identical in every way, including sail area, the boat with the smoother bot­tom will be slightly faster than a boat with a rough bottom in light air. Most racing sailors have learned the value of a smooth bottom. Ironically, cruising sailors can benefit at least as much from the creation of a low-resistance bottom as racing sailors, although you rarely see a cruising or daysailing boat with a bottom to match that of a good racing boat.