Two basic sets will be needed for the Gross-Catan scenario. A detailed list of materials needed for each scenario is provided in the appropriate rules sections. Harbour pieces For each scenario, the listed harbour pieces should be mixed up face down, then placed face up, one by one, from the resultant pile in a random order in the places shown in the diagrams. The harbour pieces found in the basic set will not be needed. Sufficient sea tiles are provided to replace them.
All rules are as in the basic game with the following additions.
The Additional Rules for the building and use of ships for the additional victory points 1. Boat building To build a ship costs 1 wool and 1 wood. They are placed stationary like roads, but unlike roads, can be moved. A ship can only be placed on a border line between 2 sea hexes or one between a sea hex and a coast line. You cannot build a ship next only to a road, nor a road next only to a ship.