Most famous of these is probably the toroidal propeller that made waves a while ago, mostly in the field of flying drones, but commercial toroidal boat props exist too. Test results of the ...

The call originally came in for a possible shark bite but quickly changed after that man's friends said no, he was hit by a boat.

Good Samaritans turned into first responders after a diver was struck by a boat propeller in Fort Lauderdale.Fort Lauderdale Fire<a class="excerpt-read-more" href=" More ...