Unguided aircraft rockets The S-13 unguided aircraft rockets employed from aircraft and helicopters. The S-13 unguided aircraft rockets are classified as air-to-ground rockets. A number of rocket versions with different warheads are available: S-13-T – with two-module concrete-piercing HE warhead; S-13-OF – with HE fragmentation warhead; S-13DF – with enhanced FAE warhead. The rockets are intended to engage different types of ground targets (from manpower to armored materiel and hardened ...