Negative Tank

The Negative tank controls are located at the center starboard side of the control room. The station has two gauges, one for the volume of water in the negative tank, and one for the compressed air reserves. It also has two hand-wheels, one for blowing the tank, and an other for flooding. The primary purpose of the negative tank is to help the boat submerge faster. It is good practice to keep the negative tank flooded while on the surface, so the boat can dive quickly and on short notice. The negative tank should however be blown shortly after the boat has submerged, as otherwise the boat will keep diving, and the deeper the depth the more air is required to fully blow the tank. It is important to make sure the flood valve is closed before you try to blow the tank, otherwise you will just be wasting compressed air to no effect.