Sensors and Armament
The Tracker carried an internal torpedo bay capable of carrying two light weight torpedoes or one nuclear depth charge. There were six underwing hard points for rocket pods and conventional depth charges or up to four additional torpedoes. A ventrally mounted retractable radome and a Magnetic Anomaly Detector (MAD) mounted on an extendable rear mounted boom were also fitted. Early model Trackers had an Electronic Surveillance Measures (ESM) pod mounted dorsally just aft of the front seat overhead hatches and were also fitted with a smoke particle detector or sniffer. Later S-2s had the sniffer removed and had the ESM antennae moved to four rounded extensions on the wingtips. The engine nacelles carried JEZEBEL sonobouys in the rear (16 in early marks, 32 in the S-2E/G). Early Trackers also carried 60 explosive charges dispensed ventrally from the rear of the fuselage used for active sonar (JULIE) with the AN/AQA-3 and later AQA-4 detection sets, whereas the introduction of active sonobouys and AN/AQA-7 with the S-2G conversion saw these removed. Smoke dispensers were mounted on the port ventral surface of the nacelles in groups of three each.
Read more about this topic: Grumman S-2 Tracker