Question

What is the general feeling about ship trap island among sailors in the dangerous game

Answer 1

“sailors have a curious dread of the place”

Sailors fear the island because of its reputation for ships running aground or succumbing to trouble

Answer 2

It's called Ship Trap Island because Zaroff needs men to hunt, so he literally causes ships to break up. He has installed lights to make it look as if a channel exists. In reality, the channel isn't there, but jagged rocks are that can tear a ship up, disabling it or causing it to sink.