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Free boating theory questions and short answers

Search-friendly answers for Day Skipper theory, Marine Radio SRC, VHF procedure, buoyage, lights, tides, CEVNI and practical revision. Each page has one question, a short answer, a mini quiz and a link to revise the full topic.

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Day Skipper

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18 questions
What colour is a port-hand mark in IALA Region A?What is an isophase light?How do you calculate tidal height for a simple depth check?What does a yellow flag mean on a boat?What is Chart Datum approximately equal to in most UK tidal waters?For practical Mercator chartwork, one minute on the nearby latitude scale represents what distance?On a vessel's sidelights, what colour marks the starboard side?If a crew member is asked to move aft, where should they move?What is the 'draught' of a vessel?What does a halyard do?What is 'leeward' and how is it pronounced?What is 'freeboard'?What is the 'kicking strap' (vang) used for?What does 'abeam' mean?What is the difference between a 'shroud' and a 'stay'?What does amidships mean?What does it mean to 'gybe'?Why must you NEVER attach a helicopter winch wire to the boat?