I was a FD Certified search and rescue diver many years ago. Most of all our dives were recovery rather than rescue.
First responders although passionate and compassionate about their work do tend to have a gallows sense of humor.
The NYPD Scuba Team regularly saves lives, but they are a full time unit that is always ready to respond immediately, from multiple bases. They also have an aviation arm, with divers standing by with helicopters around the clock.That's what I could never understand. Lifeguards "rescue" & we find the deceased or Recover. The only time there could be a "rescue"if some was in a underwater cave.