Submarine rescue ship

USS Pigeon, submarine rescue ship
Japan Maritime Self-Defense Force Chiyoda (left) and Chihaya (right)
Italian ship Anteo, submarine rescue ship
HSwMS Belos (A214) of the Swedish Navy
Guillobel of the Brazilian Navy

A submarine rescue ship is a surface support ship for submarine rescue and deep-sea salvage operations. Methods employed include the McCann Rescue Chamber, deep-submergence rescue vehicles (DSRV's) and diving operations.