Anti-Air Tactics

As far as Anti-Air Tactics go, you have 2 main options, passive defense or active defense.

Active Defense
Active defense consists of any action to eliminate or deter the aerial threat. As far as i've seen there are 2 types of active defense.

1.Pop and Drop

 * 1) Know where the plane is and will be
 * 2) Periodically surface for a set period of time long enough to fire a few rounds of flak at the target
 * 3) Submerge to 20-25 meters
 * 4) Resurface and re-engage as necessary

2. Sustained Defense

 * 1) Find out where the enemy plane is
 * 2) Surface as soon as the plane has flown away from you for some time
 * 3) Man the flak guns.