Hot water means an aquatic venue with a water temperature over 90oF (32oC).
Ballast water means water with its suspended matter taken on board a ship to control trim, list, draught, stability or stresses of the ship.
Gray water means sewage from bathtubs, showers, bathroom sinks, washing machines, dishwashers, and kitchen sinks. It includes sewage from any source in a residence or structure that has not come into contact with toilet wastes.
Fresh water means water having a specific conductivity less than a solution containing six thousand (6,000) parts per million of sodium chloride.
co-pilot means a pilot operating other than as pilot-in-command, on an aircraft for which more than one pilot is required, but excluding a pilot who is on board the aircraft for the sole purpose of receiving flight instruction for a licence or rating.