Ah yeah that’s it! It has been several years since I have even gotten the chance to dive.

Hope things go well for your course, they are useful skills that can certainly make you more confident when diving in a variety of situations.

You hear similar things when going through rescue diver certification in the PADI system of scuba diving. Been several years since doing that, but from what I recall you’d throw a floatation device to / past them if you could.

If you had scuba gear on and had to approach in the water, you’d maintain a bit of distance to assess the situation before making any kind of approach. I think you were supposed to keep your regulator in your mouth when close in case they tried to climb on you, but I could be misremembering that.