SPAA Alignment Chart; An SPAA must be in some way capable of shooting down aircraft; An SPAA is equipped to shoot down aircraft as a secondary functionality; An SPAA is purpose-built to shoot down aircraft; An SPAA is a self propelled ground vehicle; BMP-2M is an SPAA; Wirbelwind is an SPAA; Sturer Emil is an SPAA; An SPAA is a vehicle and capable of moving under its own power; Ar 234 B is an SPAA; P-51C Mustang is an SPAA; SKR-7 is an SPAA; An SPAA must be capable of moving under its own power; A soldier with a MANPAD is an SPAA; John Browning with an M2HB is an SPAA; An HVAR is an SPAA