ASW Threat
The presence of ASW ships and planes interferes with a submarine’s ability to attack. A Submarine takes a –1 die penalty to torpedo attacks (to a minimum of 1 die) if any of the following is true:

* An enemy Aircraft made an ASW attack against the Submarine during the Air Attack phase (use a token to mark it if you need help remembering);
* An enemy Ship with an ASW value of 1 or better is local or adjacent to the Submarine during the Torpedo Attack phase.

Multiple ASW Threats don’t stack; even if you have several destroyers nearby, you only reduce the Submarine’s torpedo attack by 1 die. Apply this penalty before you apply any bonuses or other modifiers. For example, a U-boat firing at range 2 normally gets 2 torpedo dice; an ASW threat reduces it to 1 die, but its Wolfpack special ability would increase the torpedo attack back to 2 dice.


Small Ship Evasion
Destroyers and Torpedo Boats are naturally evasive and hard to hit.

* Air Attack: All aircraft take –1 per attack die (or –1 torpedo attack die, to a minimum of 1) against Destroyers and Torpedo Boats.
* Gunnery Attack: Battleship main battery attacks take –2 per attack die against small ships (only hit on a 6, but 6 still counts as 2 hits). Battleship main battery attacks can’t hit Destroyers and Torpedo Boats at range 0 or at extended range.
* Torpedo Attack: Torpedo attacks take –1 die against Destroyers and Torpedo Boats. This is cumulative with the ASW Threat penalty and Crippled ship penalties. (Regardless of your normal torpedo attack value or the penalties that apply, you always roll a minimum of 1 die on a torpedo attack.)

The most important effects are protection for Destroyers against Aircraft attack and Sub attack. Note that this effect is cumulative with ASW Threat.


How to Win
The first player to score 150 points wins the game. Check your score at the end of each turn.

You score points in three ways:

* When you destroy an enemy unit, you score points equal to the cost of the unit.
* When you seize an objective sector, you score 50 points.
* If your enemy has no Ships remaining in play, you score 50 bonus points.

It’s possible that both players might reach 150 points or more in the same turn. In that case, the player who achieves the higher score wins. If at any time your opponent has no units left at the end of a phase, the game ends and you win.