Cruise line A and cruise line B drop their passengers off at a remote island for 5 days, and then come to pick them up and take them home. After cruise line B drops theirs off, the cruise ships breaks down, and the passengers can't be picked up after 5 days, so they're stuck on the island with no immediate way to get off. Cruise line A says "OK, the next cruise ship we send will be at half capacity, so we can get the passengers from cruise line B off the island and get them home."
Is cruise line A rescuing the passengers from cruise line B? I'd say yes.