Complex sentence: Cruising Islanders are more likely to have the winches for halyards and other lines mounted on the mast itself, while racing boats are more likely to have moved the sail control winches to the deck, just forward of the cockpit.
Split into simpler sentences: Cruising Islanders are more likely to have the winches for halyards and other lines mounted on the mast itself. Racing boats are more likely to have moved the sail control winches to the deck, just forward of the cockpit.