The Radar in Operation - USS COBIA SJ-1 s/n 37 (1943)

There are only two types of vessels...submarines and targets

The Target...the local carferry, taken from the radar mast, our bow in foreground

The SJ-1 unit that did the tracking
Torpedo launch control above the radar
TDC (Target Data Computer) to the left

A-Scope image of the Target in the harbor

PPI image of the Target about 5 miles out

A-Scope image of the Target about 5 miles out