General Theory of Operation

ships. It is also used as a back-up radar on large combatants. It provides a true bearing display for coastal piloting and a capability for radar navigation and station keeping. The AN/SPS replaces a variety of small commercial radars on the following types of ships: AE ASR C G N F F G LPH AGDS ATS CV LCC LST A O E A V T CVN LHA MHC ARL BB DDG LHD MSO ARS CG FF LPD PHM General Theory of Operation The AN/SPS-64(V)9 has a minimum detection range of 20 yards on a radar cross-sectional target of 10 square meters, 3 feet above the surface of the water. It can operate in either true or relative bearing when used with Navy gyrocompasses. Some special operating features of the radar include: Ship line voltage protection Ship Heading Marker (SHM) Variable range marker Configuration Figure 2-3 provides a general overview of how this radar operates. Unlike the AN/SPS-67 radars, this off-the-shelf radar system was not designed to use existing antennas and indicators. All the components, including the indicator and the antenna system, are unique to the AN/SPS-64(V)9. SIGNIFICANT INTERFACES.— Information from the AN/SPS-64(V)9 interfaces with the following Navy equipment: Blanker/Video Mixer Group, AN/SLA-10 Indicator Group, AN/SPA-25( ) or equivalent Synchro Signal Amplifier, Mk 27 or equivalent Mk 19 gyrocompass or equivalent FOR THE MAINTAINER.— The AN/SPS- 64(V)9 is designed and constructed according to the best Figure 2-3.—AN/SPS-64(V)9 radar block diagram. 2-5