Doubling the Angle on the

If, for some reason, it is not possible to bring the feature abeam then you can still get a fix by doubling the angle on the bow (see Figure 12.10).

You need to know:

1. Your height of eye

3. Dip correction for height of eye. (Dip = 0.97 sqrt height of eye = 3.1' = 0.05 )

You need to know:

1. Your height of eye

3. Dip correction for height of eye. (Dip = 0.97 sqrt height of eye = 3.1' = 0.05 )

12.8 Distance Off by Horizon Angle A Bow and Beam Bearing

If you have no means of measuring bearings, you can still find your distance off by taking a Bow and Beam bearing. This is a special case of doubling the angle on the bow using angles you can judge by eye.

Note the log reading when the first relative bearing is 45°. When the feature comes abeam, ie, the relative angle is 90°, work out the distance sailed and you have the distance off (see Figure 12.11).

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