I see a wide variety of boats here, so what exactly makes a boat a trawler?
Looking at the boats discussed here and peoples avatars, I see a wide range of boats from pure displacement boats to sport fishers.
By some definitions my boat is a trawler (full displacement hull, top speed not much over nominal hull speed, etc.). hat said, my boat is more of a classic day cruiser despite having overnight accommodations. It is 79 years old after all, so it predates the trawler period by about 35 years.
So what makes a boat a trawler?