Which indicates an emergency situation aboard?

What boats require a whistle or horn? What buoys do? Why are boats and planes streamlined? What is required when towing a person on water skis behind a PWC rated for two persons? Who owns yacht queen K? What Class submarine introduced the all electric drive to the US submarine force? What are the positives of the submarine? What do eight short blasts of a boat horn indicate? How big should a jib sail be relative to the mainsail? How many dolphin 28 boats are stored at both marinas? How long does it take a sail boat to sail a certain distance? What size battery for a 150 hp Johnson 2 cycle engine? If unaccompanied on board what must a person 12 to 15 years of age have in order to legally operate a boat with more than 6 hp motor? What do the initials MS before a ship name stand for? How many people are on board a cruise ship on any given day? Can you put a mobile home on private property in the state of Iowa? What kind of an object is a ketch? How old do you have to be to use a trolling motor? What are the states that still have mandatory busing? Will JB weld fix the crack i have on my outboard motor's mounting bracket?