AN/SPQ-9A, (sometimes pronounced as "spook nine"), is a United States Navy multi-purpose surface search & fire control radar used with the Mk-86 gun fire-control system (MK86 GFCS). It is a two dimensional radar, meaning it provides only range and bearing but not elevation. It can however, also detect and track low altitude (below 2000 ft) air targets. Initially tested on the USS Norton Sound (AVM-1), it was also deployed on Spruance-class destroyers, Kidd-class destroyers, Ticonderoga-class cruisers, Tarawa-class amphibious assault ships, California-class cruisers and Virginia-class cruisers.