Sure did. Sometimes we were the only divers around, for example, to clear a million plastic bags from the intakes off Beirut. Also training ops for limpet mine attacks, or bending shafts with demo, etc.
For example, both the Bismark and the Repulse could have been saved from the followup attacks if their damaged rudders had been blown off by a diving with UDT experience.
Certainly, the explosion to blow off the bent/jammed rudders would be harmful - just like the original aerial torpedo explosions did more damage than just jamming the battleships’ rudders, but the jammed rudder prevented both battleships from any chance of getting away from the immediate area and getting under friendly air cover.
That makes sense. As for the plastic bags, I never would have thought that would be a problem, but...yeah. I can completely visualize that issue in my head!