Good but incorrect on details of the power turn,
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This review is from: Skipper's Cockpit Guide: Instant Facts and Practical Hints for Boaters (Spiral-bound)
Just a little point but the author suggests you should be turning the rudder to port and full starboard when doing a power turn.
This is not a good procedure and will confuse most beginners.
yes IF you allow the boat to travel astern the rudder position will need to be reversed. the object generally in a power turn is to do it in a short distance and it's best just to let the prop wash do its job.