All do there are few lakes and water streams in-game there are still a few that used has short cuts to get across some areas on a map. Do amount of time you can stay underwater is limited I thing They’s tool should be added.
Momsen lung - All show to Pearl Habor sailors heavily in training it was overlooked and when ship was hit early would any survivor to use it. It reuse the air you breath to give back this limited only mugh air was in and mugh you breath was taken could be in it.