I think that whole exercise is pointless, why would a polity 3000 years ago need an underwater insertion(?) training? Especially if they are lanlocked without any big bodies of water in vicinity. I don’t think that most modern armies have more then a handful of people trained for such things and modern armies are infinitely better equipped, trained, and numerous.
Why do you think 2 minutes isn’t enough?
They were soldiers, not fishers. The point wasn’t to catch fish or do anything that required to stay underwater for long.
I think that whole exercise is pointless, why would a polity 3000 years ago need an underwater insertion(?) training? Especially if they are lanlocked without any big bodies of water in vicinity. I don’t think that most modern armies have more then a handful of people trained for such things and modern armies are infinitely better equipped, trained, and numerous.