page_title: Grumman S-2 Tracker
section_title: Variants
hierarchical_section_title: Grumman S-2 Tracker / Variants
caption_attribution_description: A U.S. Navy Grumman US-2C Tracker (BuNo 133345) from composite squadron VC-3 Chukar Pups. VC-3 operated the US-2C as target tugs in the 1960s and 1970s.
context_page_description: The Grumman S-2 Tracker was the first purpose-built, single airframe anti-submarine warfare aircraft to enter service with the United States Navy. Designed and initially built by Grumman, the Tracker was of conventional design — propeller-driven with twin radial engines, a high wing that could be folded for storage on aircraft carriers, and tricycle undercarriage. The type was exported to a number of navies around the world. Introduced in 1952, the Tracker and its E-1 Tracer derivative saw service in the U.S. Navy until the mid-1970s, and its C-1 Trader derivative until the mid-1980s, with a few aircraft remaining in service with other air arms into the 21st century. Argentina and Brazil are the last countries to still use the Tracker.
context_section_description: XS2F-1
  Two prototype anti-submarine warfare aircraft powered by 1,450 hp R-1820-76WA engines.
  YS2F-1
  Designation of the first 15 production aircraft used for development, redesignated YS-2A in 1962.
  S2F-1
  Initial production variant with two 1,525 hp R-1820-82WA engines, re-designated S-2A in 1962, 740 built.
  S2F-1T
  Trainer conversion of S2F-1, redesignated TS-2A in 1962.
  S2F-1U
  Utility conversion of S2F-1, redesignated US-2A in 1962.
  S2F-1S
  S2F-1 conversion with Julie/Jezebel detection equipment, redesignated S-2B in 1962. Survivors converted to US-2B after removal of ASW gear.
  S2F-1S1
  S2F-1S fitted with updated Julie/Jezebel equipment, redesignated S-2F in 1962.
  S2F-2
  As S2F-1 with asymmetrical (port-side) extension of bomb bay, slightly enlarged tail surfaces, 77 built, most redesignated S-2C in 1962.
  S2F-2P
  Photo reconnaissance conversion of S2F-2, redesignated RS-2C in 1962.
  S2F-2U
  Utility conversion of S2F-2/S-2C, redesignated US-2C in 1962. Some were used as target tugs.
  S2F-3
  Enlarged forward fuselage, enlarged tail surfaces, additional fuel capacity, and enlarged engine nacelles bays for 32 sonobuoys, redesignated S-2D in 1962, 100 built.
  S2F-3S
  As S2F-3 but with Julie/Jezebel equipment, redesignated S-2E in 1962, 252 built.
  YS-2A
  YS2F-1 redesignated in 1962.
  S-2A
  S2F-1 redesignated in 1962.
  TS-2A
  S2F-1T training version redesignated in 1962 and 207 conversion from S-2A.
  US-2A
  S-2A converted as light transports/target tugs, 51 conversions.
  S-2B
  S2F-1S redesignated in 1962.
  US-2B
  Utility and target tug conversions of S-2A and S-2B; most S-2Bs were converted and 66 S-2As.
  S-2C
  S2F-2 redesignated in 1962.
  RS-2C
  S2F-2P photo-reconnaissance version redesignated in 1962.
  US-2C
  S2F-2U utility version redesignated in 1962.
  S-2D
  S2F-3 redesignated in 1962.
  YAS-2D/AS-2D
  Proposed self-contained night attack aircraft to be developed under Operation Shed Light; none produced.
  ES-2D
  Electronic trainer conversion of the S-2D.
  US-2S
  Utility conversion of the S-2D.
  S-2E
  S2F-3S redesignated in 1962.
  S-2F
  S2F-1S1 redesignated in 1962.
  US-2F
  Transport conversion of S-2F.
  S-2G
  S-2E conversions with updated electronics (primarily AN/AQA-7 DIFAR sonobuoy processor and AN/ARR-75 sonobuoy receiver)
  CS2F-1
  Initial production run of anti-submarine warfare aircraft for Canada based on S2F-1. A total of 42 built by De Havilland Canada.
  CS2F-2
  Improved version of CS2F-1 with Litton Industries tactical navigation equipment. A total of 57 were built by De Havilland Canada.
  CS2F-3
  New designation given to 43 CS2F-2 aircraft upgraded with additional electronics.
  CP-121
  New designation given to all CS2F-1, -2, and -3 aircraft following unification of Canadian military in 1968.
  Military S-2T Turbo Tracker For Argentina
  Upgraded S-2E with new engines and military equipment by IAI in the 1990s for the Argentine Navy. 6 upgraded.
  Military S-2T Turbo Tracker For Taiwan
  Upgraded S-2E/S-2G with new engines and military equipment by Grumman from 1986 to 1992 for the ROC Air Force. 27 upgraded.
  S-2T Turbo Tracker
  Civil conversion
  S-2AT
  Civil firefighter conversion with turboprop engines.
  S-2ET
  Civil conversion
  Marsh Aviation S-2F3AT Turbo Tracker
  Turboprop conversion, powered by two Garrett TPE331 engines; A total of 22 are operated by the CDF.
  Conair Firecat or Turbo Firecat
  Civil conversion as a single-seat firefighting aircraft.
  For the crew trainer/transport version based on the Tracker refer to Grumman C-1 Trader
  For the Airborne Early Warning version based on the Trader refer to Grumman E-1 Tracer
caption: A US-2C of VC-3.
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