15 December 1965
DATE: 1 July 1964
COGNIZANT SERVICE: USN
FEDERAL STOCK NUMBER:
STATUS OR TYPE CLASSIFICATION
Mfg(s) Name or Code Number: Philadelphia Naval Shipyard, Philadelphia, Pa.
No Illustration Available.
(with two (2) vertical antenna positions). The antenna
group does not include the antenna or below decks
The group extends through a standard
The AN/BPA-4 provides a retractable positioning
periscope housing. A rotation of 360 deg (continuous)
system for submarine search radars SS-A, SS-1, and
at six (6) rpm or sector scan is provided.
SS-2. It permits search operation while submerged