Background
When fleeing a dungeon through glyphs, the heroes get back to their home port. When fleeing an encounter by leaving the map with the ship, the heroes are able to sail on. The rules do not say what happens to heroes who leave an Island level with their ship.
Question
Q: When the heroes flee from an Island level by leaving the map with the ship, do the heroes get back to their home port, or do they remain on the Island location?
A1: They get back to their home port. The Island location is marked as explored. The game week ends.
A2: They remain on the Island location, which is marked as explored. The game week ends.