The Brilliant Abyss book jacket

The Brilliant Abyss is a beautifully written and highly engaging book which takes the reader to the depths of the sea bed, says Julia Jones

With a tidal stream of 4 knots, would you set off on port or starboard tack from the Needles to Cherbourg? Credit: Graham Snook/Yachting Monthly

There is a strong tidal stream. Would you set off on a port or starboard tack? James Stevens answers your questions of seamanship