What are the controls like?
On smaller subs they can be aircraft like with a joy stick for the control surfaces. Linkage to the control surfaces can be cables and pulleys with sealed shafts going through the hull. On larger subs they can be hydraulic or electric with controls being with computer type joysticks or switches. Motor controls can be by switches or joysticks. The valves for flooding and blowing ballast tanks are from manually operated valves to being remotely controlled hydraulically activated. Depends on what the designer wants. Typically for a small PSBUS the controls are simple. On largers subs the controls are more complex because the operator just can’t physically manipulate the control surfaces himself so he needs haudralic assistance, or the valves are not conviently location.
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