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D.2 SEA SPARROW MISSILE SYSTEM (RIM-7)

  • Concept study in 1960s, using then-current ASCMs and aircraft as the threat,

  • RIM-7H program begun about 1970 with multinational group (4 countries, grew to 13),

  • Became the standard NATO ship self-defense missile,

  • RIM-7M (Block II) introduced in 1978,

  • Weapon system concept consists of three elements: L-band radar + IFF +

  • RIM-7P programmable computer introduced in 1990, Mk-23 target acquisition system,

  • Automatic fire control system (manned only to intervene in automatic process); Mk-57,

  • Current sea sparrow missile (RIM-7P), based on Navy AIM-7F sparrow air-to-air missile,

  • Same booster, guidance, and control with remote arming and “homing all the way” guidance,

  • 20-cm (8-in.) diameter, 3.65 m long, 1-m wingspan,

  • 350 m/s average speed, boost + coast,

  • Motor-boost (3 seconds) + sustain (15 seconds),

  • Optimum intercept range 1.5 to 6.5 km (6 to 25 s flight time),

  • Weight 232 kg,

  • Semiactive RF monopulse seeker,

  • Target continuously illuminated by ship's radar,

  • Warhead weighs 35 kg and is blast fragmenting,

  • RF proximity fuse,

  • Now on CVNs, LHDs, AOEs, AORs, DD963s,

  • Not on older amphibious ships, and

  • Has hit nonmaneuvering Styx and Exocet missiles in exercises.

D.3 ROLLING AIRFRAME MISSILE (RAM) MK-31 GUIDED MISSILE SYSTEM

  • Concept developed at Johns Hopkins University/Applied Physics Laboratory in the early 1970s to counter RF-emitting ASCMs,

  • Missile dimensions: 12-cm (5-in.) diameter, 2.8 m long, 45-cm wingspan,

  • 2 steerable canards and 4 tailfins for roll control,

  • Missile weight: 74 kg,

  • Employs Sidewinder solid rocket motor (Mk 36-8 or Mk 112),

  • Boost (5 s) + glide,

  • Optimum intercept range: 0.8 to 5 km (3 to 10 s),

  • Launcher: 21-cell Mk-49,



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