A series of tests were conducted at sea for the purpose of evaluating the application of the twinned agents, 'Light Water' - Purple-K-Powder, from the Twin Ball Fire Fighting Unit, application of 'Light Water' from a helicopter, and P-K-P from portable extinguishers. Also studied were the characteristics of the NBC 'washdown' nozzles as possible basis for the introduction of a 'Light Water' based installed fire protection system for the flight deck. Wind speeds and patterns were measured at various heights above the deck to establish their role in fire fighting operations. The major portion of the work was done under 30 knot winds characteristic of the wind speed during aircraft launch and recovery and representing the most severe conditions for extinguishing fires. The air flow over the deck below the 6 ft level was found to be laminar in character with marked diminishment in speed at levels near the deck. Thus, the detrimental effects of wind on the discharge patterns of fire extinguishing agents was not serious in the down-wind direction but did severely limit the cross-wind agent reach. The water distribution pattern from the 'washdown' nozzles offers good potential as a base for a fire fighting system which with 'Light Water' will offer both fire extinguishing and ordnance cooling capabilities.