100. The Art And Science Of Navigation Marine navigation blends both science and art. A good navigator constantly thinks strategically, operationally, and tactically. He plans each voyage carefully. As it proceeds, he gathers navigational information from a variety of sources, evaluates this information, and determines his ship’s position. He then compares that position with his voyage plan, his operational commitments,…
Canting Keel Centerboard, swing keel, or keel, new monohull sail boat purchasers should at least consider vessels like Sadlers, Potters, Etaps and MacGregors that have solid flotation. They should also choose thin rather than wide monohulls. The thinner the hull, the more it is like a log in that it is self righting and of…
High freeboard improves buoyancy with no decrease in hull speed. Sailboats at rest with low freeboard only look faster than many of their high freeboard counterparts. Unless the boat has the general shape of a log, the heel of the vessel increases the freeboard presented to the wind. High freeboard presented to the wind when…
US Sailors who cruise are different than those who just race. A US pure racing sailor views sailing as a competition between human athletes with the vessel being equipment. A US cruising sailor views the crew as components of the vessel required to make it seaworthy. These views have implications in crew selection and training.…
The notion of designing a vessel from a luxurious interior out doesn’t sit well with me, but this is likely the situation with most new sailboats today. In aircraft builds an approach called Lean is followed. This means that base functionality is engineered first before creature features (features that are intended to get a customer…
Murrelet’s potential as a racer was recognized shortly after her launch in 1999. The manufacturer even oriented its promotional literature around this potential. But racing organizations were reluctant to allow unballasted operation and it really wasn’t until 5000 hulls were launched that serious racers began to take notice of the one-design racing potential. In addition,…
The competing hull forms in Murrelet (displacement in the bow and planing aft) bring up some interesting aspects in sailing the cruiser. Because the manufacturer built so many pocket cruisers, the best hull form and ballast configuration was extensively studied. For example, one contemplated factory modification in 2000, involved adding a platform to the transom…
Most boats carry sails that perform well enough to satisfy on trade-wind routes where three-quarters of the time the wind may be aft of 110 degrees apparent and there are opportunities for flying symmetrical shaped sails, like square sails and spinnakers. Spinnakers are usually made of a light material that doesn’t require a lot of…
James Boyd in his April 2005 Sailing World article (page 45) notes that the Vende Globe machines with canting keels also have water ballast. The question as to which is the primary ballast system on boats that have both may have been answered in that article. Vincent Riou, who is kind of a McGyver (technically…