1 - Load a game with a few Hunter HMG's (so there is sufficient ammo to destroy a target with and not require re-arming).
2 - Also load in the KA-60.
3 - Fire the Hunter HMG's machine gun into the main fuselage of the KA-60 with as many rounds as possible from each vehicle until it is destroyed and note the number of rounds taken.
4 - Keep all rounds in the same spot so as to ensure that the damage dealt is always the same and not hitting the other vehicle components. (engine, wheels, etc...)
5 - Repeat steps 1,2 and 3 but this time with the AH-9 taking the place of the KA-60.
6 - Repeat steps 1,2 and 3 but this time with the Irfrit taking the place of the KA-60.
7 - Repeat steps 1,2 and 3 but this time with the Speedboat taking the place of the KA-60.