I don't think it is clear yet. Atleast not to me.
It might help if you explain in which location you do something.
Above the hatch to the radio/hydrophone is a wheel to open and close the forward ballast vents. To let in or block water from going in.
Same at the back bulkhead near the compressor is the wheel to open and close the aft ballast vents. To let in or block water from going in.
Just behind the diving station are 2 places with wheel valves:
The front with 3 dial and a single wheel. 2 dials showing the volume (flooding level) of the fwd and aft ballast tanks. Both show an independent volume of around 75 cubic meter. And 1 dial showing the amount of compressed air left in the compressor tank. The wheel is used to blow these tanks empty. It cannot fill it. If the ballast vents are open then you waste compressed air by turning this wheel.
Behind that is the negative tank station. It has 2 dials: a water volume gauge and a repeat of the air left in the compressor tank. It has 2 wheels. One with which you can express this negative tank with air. The other to fill it with water. It has only a volume of around 4 cubic meters. (or 4.5 cubic meters, can't remember exactly) It is used to provide negative buoyancy against the neutral buoyancy you would have when the main ballast tanks are full of water.
[edit] And there is the bilge pump with a dial showing volume in the bilge tanks. These should only fill when you are making water by damage or seeping water coming in at deep depths.
|