'n' which is the algebraic representation of 'the number' of boats you own. '+1' represents one that you want to buy. n+1 is the steady state of all people who love boats. With her outstanding living spaces, the Sunreef 70 "n+1" balances extreme comfort, great performance under sail, and advanced technology. The yacht’s hull and superstructure were designed to maximize living space and seaworthiness.