On the same topic, I've heard that every supertanker has a proximity radar in order to avoid to collide with small boats. However, in some heavy-traffic routes

On the same topic, I've heard that every supertanker has a proximity radar in order to avoid to collide with small boats. However, in some heavy-traffic routes like the Straight of Dover or Gibraltar the proximity alarm goes off constantly. So the commanding officers usually disable them, leading to a good number of accidents with fishermen boats.