Center fixed (approximately)
Direction of wave motion
Fig 4.19 Partido motion in a wave
Fig 4.20 Influence of wave on the stability curve - Grimalkin reductions may occur, as shown in Fig 4.20. Grimalkin's stability curve is shown for a wave height of 12 metres and a wave period of 9 seconds. These extreme conditions were actually measured in the Fastnet disaster in 1979. It is seen that on a wave crest the stability is almost halved, and this is at a position when the yacht is most exposed to the wind.
Heel angle [dog]
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Lets start by identifying what exactly certain boats are. Sometimes the terminology can get lost on beginners, so well look at some of the most common boats and what theyre called. These boats are exactly what the name implies. They are meant to be used for fishing. Most fishing boats are powered by outboard motors, and many also have a trolling motor mounted on the bow. Bass boats can be made of aluminium or fibreglass.