This is a simple mod that I made for a pirates smp with my friends.
What this mod does is that the player will now have an stamina bar that will decrease the moment you are in water and it will go down faster if you swim, the moment you are with no stamina you will get bad effects and sink faster, so measure your breath.
For this I made a custom effect that will help in case you need to dive or go across a big body of water.
Iron Lungs:
