Launch rate: one every 3 s,

Original seeker was “fire and forget,” using passive, dual-mode (RF/IR)stinger missile seeker,

Acquisition and initial track using RF from incoming missile,

Transfer to IR for terminal-track, reticle scan in 4.1- to 4.5-mm band,

Block I upgrade (RAM II) uses a linear-array IR detector in seeker,

Dual-mode RF/IR or IR only,

Completed operation tests, entered fleet in 1999,

Maneuverable up to about 25 g,

Engaged a maneuvering Vandal missile during an exercise,

9.5-kg warhead with 3-kg high explosive,

New low-altitude fuze,

Dual-thrust motor,

Possible RAM upgrades,

Larger diameter (14 cm to 15.5 cm), greater range,

Maintains high velocity over entire trajectory,

Increased maneuverability,

Uplink to missile will allow target acquisition in bad weather,

Sea RAM,

Industry development in response to British navy request,

Shorter inner range, faster response time,

Uses phalanx 1B's high-resolution, target-search-and-track sensor, and

CIWS 20-mm gun is replaced with RAM Block I, 11-tube launcher.