The dying part is due to not being under some cover - Cover as defined by what's overhead while you're in the water. All spawns are in 'safe' areas, where the descending func_hurt won't kill you.
I sadly did not make the map with the ability to get out of the water in mind.

Thanks for the feedback!
I'd make some changes if Hammer for GMod wasn't borked at the moment.

We just kept dying x) I like the concept and quite unique atmosphere, but since we have jetpack for survivalist in our TTT server and there is also grapple hook for example people just can go till skybox since there is no invisible wall which makes it bit unbalanced xP And for some reason whatever dust/rain/snow? particle should fall it was just mising texture - texture , just letting you know

Thanks, I try to take screenshots that represent the map, and the compile and cube maps worked out nicely.

looks nice from the pics