The term 'BOAT MASTERY' can be broken down into two crossword solutions: 'BOAT' and 'CRAFT'. 'BOAT' is a 5-letter word that refers to a large vessel used for transportation on water. It is typically powered by an engine, sails, or oars. 'CRAFT' is also a 5-letter word that refers to an activity involving skill and knowledge in making things by hand. This could include woodworking, pottery, weaving, and other forms of artistry. Together, the two words form the term 'BOAT MASTERY', which refers to the skill and knowledge required to operate a BOAT.