thanks for the answers. I'd missed the timing in the sequence of play regarding paying for your bid.
On the Polyphemus question there are a number of spaces adjacent to islands where if a fleet was moved just one space from that position it would still be adjacent to the same island. So my question is would the fleet be destroyed if it is still adjacent after having been moved one space from its starting position.
Hope that made sense.
You are required to push the ship to a legal spot, if possible. There are spots on the board where there is no legal spot (the only hexes a ship can move to are adjacent to the island), as you mention. In these cases, the ship(s) is/are destroyed and returned to their owner's supply.