Its an elastic sling used for hurling bait into the water to attract fish toward your baited hook on the end of your fishing line.
A fishing bait catapult is generally a type of slingshot used to spread bait in an area to attract fish. It allows someone from shore to set bait (like particle bait or sweet corn) farther out than they can through. Commonly, but not exclusively, used for carp fishing. See related link for video.
catapult
you make a catapult!
Catapult is a noun.
where was the catapult used
A Trebuchet Catapult
A mangonel is a kind of catapult.
A mangonel is a catapult, not a bridge.
how did you incresed the accuacy of your catapult
Who invented the rocket Catapult
They used the catapult for war.
Owen designed a new catapult for the navy to use on its aircraft carriers. Lady Taylor Smith