sea of blood, island map

By Headspin, in Descent: Journeys in the Dark

on the island map, can thge overlord spwn mosters behind the ship, then board the ship, then scuttle the ship on the rocks while the heroes are on the island.

what are the spawning rules for the island map?

Headspin said:

on the island map, can thge overlord spwn mosters behind the ship, then board the ship, then scuttle the ship on the rocks while the heroes are on the island.

what are the spawning rules for the island map?

FAQ pg18
Q: If monsters steer the ship off the map, do the heroes flee as well, just like if they'd have steered it off themselves?
A: Monsters may not operate the Revenge during island levels

The monsters can spawn behind the ship (Masts block LOS, but the ship itself does not) but they cannot scuttle the ship.
Spawning rules are the same on islands as anywhere else - not in LOS, nor on an obstacle etc.