We have never had a long range airborne SAR asset.
Only a
Search asset.
Rescue needs a helicopter, or yes a ship.
...and don't make me laugh that dropping a life raft is a "rescue".
You get rescued in most cases
from a liferaft, not into one.
Yes I would agree that that is the way to describe the SAR aspects of an MPA, as a freebie bonus if you have the aircraft.