- create a player near the shore line in editor
- run these commands in debug console
player addItem "G_Diving";
player assignItem "G_Diving";
- move the player in and out of the water (when moving out of the water player has to move some meters further away then at the point required when entering)
Repeat for non-underwater goggles but giving the player:
player addItem "G_Shades_Black";
player assignItem "G_Shades_Black";