The Complete Day Skipper by Tom Cunliffe

Author:Tom Cunliffe
Language: eng
Format: epub
ISBN: 9781472924186
Publisher: Bloomsbury Publishing
Published: 2016-09-21T16:00:00+00:00

FIG 7.2 Angle of cut.

FIG 7.3 A traditional three-point fix worked up from handbearing compass position lines to form a ‘cocked hat’. Note that the objects chosen give a good ‘cut’ as shown by the almost equilateral triangle.

Sources of PL

The bearing of an object taken with a handbearing compass – this requires practice in a rolling boat, so get some in. Shore objects are best, as buoys may drift a little.

Be creative when looking for bearings. Don’t just use lighthouses and beacons. Try a chimney or two, the edge of an island, or anything else you can dream up.

The best PL of all is a transit. Line up any two convenient charted objects and you have a bomb-proof PL of great accuracy. Remember to check it with your compass to make sure you’ve identified the correct objects. If the transit is an officially set-up leading line (Chapter 8), so much the better, and don’t forget the old trick of lining up two headlands just as they ‘open’ or ‘close’.

If a charted object is coming into line with the ship’s head, steer to bring it dead ahead or dead astern and use the steering compass to take an easy bearing. An object that may be brought abeam can be sighted along the mainsheet traveller. When it is ‘on’, note the course, then add or subtract 90° to find the bearing.

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