Mailport & PS Advisor

I was wondering if you folks have ever evaluated the various kinds of plywood for use in marine environments. Needing to replace a bulkhead, I went plywood shopping with a friend. Its his belief that theres little difference between regular plywood and marine plywood, other than the price. He says its all the same glue, and that different glue wouldnt matter because wood is wood and it all delaminates the same when exposed to water. What are your thoughts?

In your June 2008 article "Comparing the Latest Inflatable PFDs," you mention at the beginning of the article that Personal Flotation Devices (PFDs) should be cleaned and stored as directed by manufacturers and that inflation mechanisms should be routinely inspected. In the case of inflatable PFDs that meet Safety of Life at Sea (SOLAS) standards, such as the Viking products you reviewed, it is a SOLAS requirement that they be inspected and tested in the premises of an approved service station every 12 months. In all other cases, this is highly recommended for an item of lifesaving equipment. Your article goes on to say that re-arming and re-packing a PFD generally is easily carried out. I suggest that this information is dangerously misleading. A manufacturers manual for a PFD can run into more than 100 pages covering the unpacking, cleaning, inspection, testing, repair, and assembly. Hopefully, you will be able to enlighten your readers to the risks they take by not having a PFD professionally inspected once it has been used.

My wife and I have owned our boat since 1985. We now keep it in the British Virgin Islands, where the Caribbean sun is tough on finished wood and fiberglass. The reason I am writing you is to get your true feeling about novices handpainting our decks. We want to keep the nonskid and the white border design we currently have. The decks were Awlgripped by the factory in 1992, but this has turned chalky and shows tremendous wear. Is it feasible to try such a project? Or should I just pony up the money to have it done? We have time and plenty of elbow grease and a willingness to try.

Presto Protech was among several acrylic coating-type products recently applied to one of our test boats, a 1974 ODay Javelin. Drying almost upon contact, this UV-activated product was one of the quickest to apply. Its gloss compared to that of a conventional paste wax. How long it lasts is a key question that we have yet to answer. A full report on Presto Protech and similar products will appear in a future issue. Our most recent long-term test of these types of products ("Hull Restorer Test," May 2007), showed that one product, Poli Glow, retained gloss on the bow section of our white test powerboat for three years, longer than any conventional boat wax that we have tested. Keep in mind that the acrylic-type products do not "restore" gelcoat. They only cover it-imperfections and all-with a clear, glossy plastic coating that, in some cases, hides minor scratches. For best results, you will still want to eliminate as much oxidation as possible prior to application. Finally, strictly follow the instructions on these products. Buffing the hull with a product that has silicone, Teflon, or some other agent can inhibit adhesion. You might have to avoid using certain cleaners that can peel off the coatings. While the acrylic coatings have outlasted waxes in our tests and several readers have reported great results, we believe that the simpler, more forgiving buff-and-wax routine is suitable for the vast majority of boat owners. PS is currently testing paste waxes as well. And if youre ready to paint, check out our topside paint test, which kicks off on page 27.

I have an air-conditioning unit with more than 14,000 BTUs. Here in Florida, with a 38-foot boat, that just doesn’t hack it. The unit’s been checked for efficiency by a technician. My prior boat (also 38 feet) had two units totaling over 20,000 BTUs. Those were effective, but that output is enough to cool a small store ashore. How are boat A/C BTUs determined? I suspect the temperature of coolant water is a major factor. Also, what is the effect when coolant water is suppressed by a clogged filter? Are they built to automatically shut down the compressor?

I just completed a family, 17-year, and 50,000-mile circumnavigation onboard Hippos Camp, our 1985 Morgan 43. And I think the Morgan 43 should be included in your list of strong and reliable boats. In addition to 17 years at sea, Hippos Camp has endured-unscathed-36 hours in the 1994 Queens Birthday storm in the South Pacific, and dealt with the vertical seas of the Agulhas current in 40 knots of wind in the Mozambique Channel. The gelcoat and nonskid on our 22-year-old boat are original and look almost new after polishing. The Perkins 4-108 has 5,700 hours and runs like a Swiss clock. The Morgan 43 is also a remarkable performer in light air. We crossed the Bay of Bengal at an average speed of 4 knots with never more than 8 knots of wind. This is, in my opinion, a real asset. The Morgan 43 was made by Morgan Yachts before it was bought out by Catalina. I think Morgan made 77 43s, and a few more 44s before it stopped.

I recently purchased an older boat. Not long before the purchase, the previous owner had the wiring replaced. All the workmanship seems to be in good order, with all connections and terminations made with Ancor crimped connectors and sealed in shrink tubing. All the wiring is the proper gauge (AWG) stranded wire. The only problem is that the wire used was not marine-gauge tinned wire. I am wondering what the risks are to leaving it as it is. Clearly to rip it all out and do it again would be very expensive. I am not using the boat that much and don’t intend a circumnavigation any time soon. If the connections are well made and the wire sheathing remains intact, what is my risk of wire corrosion with the un-tinned wire in a marine environment?

I have been following your articles on teak maintenance with great interest. I have an Oyster 56 with teak decks and teak toerail. I live in South Florida, and this is my second Oyster. I damaged my first teak deck as well as the metal fittings around it with too much love. With this deck, I have been very careful and only lightly wash. The deck is OK, but I have a toerail that overhangs the sides. I was reluctant to varnish it as it often gets scratched, but it is beginning to look bad. After reading your April 2008 article, Im thinking that applying one of the teak oils may be a solution. Did any of those you tested seem suitable for touch-ups when scratched or nicked? Was there one that could be easily wiped off gelcoat without staining it?

I am building an electrical system that will hopefully support wife and two teenage daughters. With this objective, I am planning approximately 1,000-amp hour battery bank. I see lots of hype about the external three-stage voltage regulators. Do they really provide more amp hours during the limited engine running time? If so, I have not found any definitive side-by-side comparisons that convince me that three-stage regulation is more efficient than a single-stage constant voltage regulator.

I am writing to add some additional comments on the article "Navigation, a Lost Art?" in the January 2008 issue. The aim of your article was on target, and I agree with the points given concerning the limits of technology. The various devices mentioned in the article fall into two broad categories: those such as GPS chartplotters that help the sailor to maintain the spatial awareness that lies at the heart of navigation and those that help the sailor to maintain a better lookout. Radar actually lies in both categories. A third category includes devices used to communicate, but these are outside the scope of the article. A fundamental issue is whether the use of GPS chartplotters is of greater help in maintaining spatial awareness than paper charts.I think not. On our boat, which has a GPS chartplotter, we find that the small screen gives us a restricted view of our situation. In order to get a broader view, we must change the scale, but that causes information such as ledges, buoys and water depths to be omitted, in order to avoid excessive screen clutter. The result is that we keep the plotter on a large scale in order to keep buoys, etc. on the screen. It is akin to peering at the world through a mousehole. Our chartplotter also has the option of a radar overlay, but the optimal choice of radar range to detect other boats does not always coincide with the optimal scale of the plotter needed for navigation.