Objective: sink the enemy's Flagship.

Each type of vessel has it's own vulnerability and must be attacked in a different way in order to sink it. Every ship, except the Flagship, can slide any number of spaces horizontally or vertically, like a Chess Rook. The Submarine has the additonal power of being able to dive underneath a single intervening ship of either side. It can only do this maneuver when repositioning itself. A Sub must remain surfaced when attacking an enemy vessel.

The different types of vessels and the way they must be attacked are:

A - Aircraft-Carrier: [Custodianship] An Aircraft-Carrier is a massive warship that is much too powerful to be attacked by a single ship working alone. Instead it requires two ships working together in order to sink it. When a move is made that surrounds an enmey Aircraft-Carrier on two opposite sides, the sandwiched ship is sunk. This an attack by custodianship.

B - Battleship: [Cannonade] A Battleship is a large warship. To sink it requires a missle strike. An enemy Battleship can only be sunk if there is another ship, of either side, in between it and the attacker. The attacking ship leaps over the intervening vessel and lands on the enemy Battleship, like a missle. This is just like the capturing method of the Cannon from Chinese Chess.

C - Cruiser: [Withdrawal] A Cruiser is a medium class warship. A salvo of artillery fire is required in order to sink it. When the attacking ship begins adjacent to the enemy Cruiser and moves away from it in a straight line, the Cruiser is fired on and sunk. This in an attack by withdrawal.

D - Destroyer: [Leaping] Destroyers are small, light warships that are often assigned patrol or escort duty. They can be sunk by being rammed. If an attacking ship runs into a Destroyer, it rams through the enemy ship to the vacant space directly behind. If the space behind the ship is occupied, then the Destroyer can not be rammed. After ramming the Destroyer, the attacking ship may continue to sail in the same direction. This is an attack by a long leap.

S - Submarine: [Displacement] A Submarine is sunk by having the attacking ship float over the submerged Sub and dropping depth charges on top of it. The attacking ship moves to same space as the enemy Submarine. This is an attack by displacement.

F - Flagship: [Advancement] The Flagship is a specially modified frigate that carries the Admiral in command of the fleet. Instead of the usual set of armaments, the Flagship is loaded with surveilance and communications equipment. This allows the Admiral to monitor and coordinate the battle with all the ships in the fleet. Unfortunately, this also means that the Flagship is unable to attack any enemy vessels. Also, the ship is weighed down with the extra equipment. This means it can only move one space orthogonally at a time. The Flaghship is sunk through a torpedo strike. The attacking vessel moves towards the Flagship in a straight line and stops on the space immediately before it. This is an attack by advancement.

Multiple captures are not possible. A vessel must concentrate fire on one ship at a time. Also, captures are not mandatory. So if a ship makes a move that would result in a capture, they can decide simply to reposition themselves and leave the enemy vessel on the board. A Flagship may not be used as the second ship in the custodian capture of an Aircraft-Carrier. A Flagship may be used as the intervening 'screen' for attack against a Battleship.