Question

how does a trawler man catch fish in deep water​

Answer 1

Answer:

A trawler is a boat that drags a net behind it to catch whatever fish are there. By using weights and "doors" or "otter boards" (basically heavy angled boards) and dragging it with hundreds of feet of rope it can drag the net at whatever depth it wants to, at least down to a couple hundred feet.

Such nets are very sturdy in order to hold up if they're bumped along the bottom, and in fact bottom trawlers are very destructive, destroying bottom vegetation and scooping up (and killing) lots of immature fish, along with whatever fish or shrimp etc. they are targeting