The Florida manatee is often injured by boat propellers, as they often bask just below the surface, and cannot be seen by boaters.
boat propellers
it will hit them and hurt them seriously
He was killed in a boating incident. The propellers of the boat cut him.
The oars or when a motor is used, the propellers on the shaft sticking in the water.
Power Boats, Yachts. Any boat that has a motor on it. Or one that is powered by human and has a propeller on it (mostly known as a pedal boat or paddle boat).
The majority of boat props are aluminum. You can't solder it, it has to be welded or heli arced.
It was 882.5 ft. long. My boy and I are building a plastic Titanic model and I see that it has three propellers (known as "screws" in the boat world). So it would be a triple screw if I am correct.
She got her legs cut in a boat motor thing. . the . . the. . propellers! that's it. .
It is important to consider how fast you want your boat to travel. It's also important to find out what the recommended propeller size is for your boat's engine.
a steam boat, or a steam ship somtimes is caled a steamer. which is a ship in which the primary method of propulsion is steam powered, typically driving propellers or paddle wheels
The Amphicar. Built in the 60's. Not a very good car or a very good boat but it had propellers and could be driven slowly into the water.
It could be tides, or waves, or wind. It could be a movement of cargo or people in the boat. It could be propulsion by oars, punts, paddles, propellers. There is not enough information to answer the question.