Check to make sure it has all the required safety equipment. This is set in law by the  Coast Guard. Boat Rentals from 8 m to 12 m (26 to 39 feet) in length require life jackets or PFDs (one each of an appropriate size for each person on board); a buoyant heaving line of at least 15 m in length; a life buoy with 15 m of buoyant line; a rebounding device (ie. ladder); an anchor with at least 30m of cable, rope, or chain; one bailer or one manual pump; a class 10BC fire extinguisher (if Boat Rental is powered or has cooking or refrigerating appliances); distress signals (watertight flashlight and 12 Canadian-approved flares of which six must be either Type A, B, or C and at least two of Type D; and navigation equipment consisting of a signaling device and navigation lights that comply with Collision Regulations. If the Boat Rental is from 12 m to 20 m (39 to 65.5 feet) in length, then it requires all the above together with the following: a bilge pump instead of manual bailer, fire extinguishers (class 10BC, one at each entrance space where a cooking or refrigeration appliance is located, one at the entrance to the cabin and one at the entrance of the engine compartment); and two fire buckets.