What is the fine-grained topic of the following text: Furling head sail, battened main sail, cockpit gps plotter, autopilot, depth sounder, wind and speed instruments, solar panels, electric anchor windlass, bow thruster, swimming platform, deck shower, cockpit speakers, folding gangway, dinghy, outboard engine with crane hoist, life raft, EPPIRB, VHF, full safety equipment, fully equipped galley with gas stove, electric fridge, hot water showers in both toilets, holding tank, 40 HP Yanmar diesel engine with sail drive. Only return the topic.
Sailing Boat Features and Equipment