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(2) Even ordinate Tchebycheff rules are preferred as they are as accurate as the next highest odd ordinate rule.

(3) A Tchebycheff rule with an even number of ordinates is rather more accurate than the next highest odd number Simpson rule.

Polar co-ordinates

The rules discussed above have been illustrated by figures defined by a set of parallel ordinates and this is most convenient for waterplanes. For transverse sections a problem can arise at the turn of bilge unless closely spaced ordinates are used in that area. An alternative is to adopt polar co-ordinates radiating from some convenient pole, O, on the centreline (Figure 4.6).

1 r180 2

Area of the half section = ^ r2d0

2 Jo

If the section shape is defined by a number of radial ordinates at equal angular intervals the area can be determined using one of the approximate integration methods. Since the deck edge is a point of discontinuity one of the radii should pass through it. This can be arranged by careful selection of O for each transverse section.

How To Have A Perfect Boating Experience

How To Have A Perfect Boating Experience

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.

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