Noun
S-2
(military, intelligence, US, initialism) staff military intelligence officer position in smaller units, or section in larger formations
Aftermath Panel S-2 of the National September 11 Memorial 's South Pool, one of three on which the names of victims from Flight 175 are inscribed. Source: Internet
Although the planes are old, being in storage kept them serviceable and using them is a cheaper way to fulfill short-range airborne ASW capabilities left after the retirement of the S-2 Tracker than buying newer aircraft. Source: Internet