surf - tank
- surface to port area ratio
- surface to space antimissile missile
- surface to space antisatellite missile
- surface to space missile
- surface to space weapon
- surface to subsurface missile
- surface to surface missile
- surface to surface missile launcher
- surface to underwater missile
- surface treatment
- surface warhead
- surface water source
- surface wave
- surface wave magnitude
- surface waviness recorder
- surface zero
- surfaced road
- surge chamber
- surge damping valve
- surge limit
- surge tank
- surplus charge
- surprise attack
- surprise nuclear attack
- surprise target
- surrounding air
- surrounding atmosphere temperature
- surrounding fluid pressure
- surroundings luminance
- surveillance
- surveillance calibration satellite
- surveillance equipment
- surveillance of fire
- surveillance of submarines
- surveillance operation
- surveillance radar
- surveillance satellite
- surveillance system
- surveillance technique
- surveillance techniques
