Harbor

Rules
Move any one of your existing settlements to a water hex. Build adjacent if possible.

FAQ
KB card Fishermen

You get no points for settlements on water hexes

Adjacency is checked when placing the piece

Check for eligible hexes adjacent to any of your settlements on the map after you pick up the settlement to move.

Strategy
Remove the only settlement touching a water hex. Then place it freely on the board.

Use the Harbor to connect settlement areas over water for KB cards like Merchants, Messengers etc.