The S-355/T is the shelter for the Photographic/Transport Group AN/TYA-25 (5895-884-1778) (S-355/TYA-25)and the shelter for the Maintenance Transport Group AN/TYA-24 (5895-999-~952) (S-355/TYA-24).
AN/TYA-25 is part of the TAOC (Tactical Operations Central) AN/TYQ-2, AN/TYA-24 is related to it.