Chart Navigation & Plotting · Fixes & LOPs
The 'bow and beam' bearing technique gives you, at the moment the object is abeam:
- AYour speed over the ground
- BYour compass deviation
- CThe set of the current
- DThe distance run between the bearings, which equals the distance off when abeam✓ Correct
Explanation
Taking a bearing 45° on the bow and again at 90° (abeam), the distance run between the two bearings equals the distance off the object when it is abeam. It is a special case of doubling the angle on the bow.
Authority: Bowditch, Pub. No. 9 (special bearing techniques)
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