I will be surprised if anyone can list all the penetrations. There are over 10,000 valves on a 688. Most submarine qualified persons will know those valves that are central to good damage control and they will know the valves central to their normal duties.
Excellent comments from Bill and Bubblehead Nuke above.
Vertical Launch System (VLS) on those 688s that have them:
*There is a pressure & vent control system that penetrates the hull. Major system components are inside the people tank. The system uses 700lbs air.
*In addtion to the torpedo tubes and other components mentioned by Bubblehead Nuke (a former shipmate of mine) the torpedo system uses equalization valves that must penetrate the hull. (Don't forget that the torpedo ejection system uses 2000 lb air.)
Other ship systems using valves that penetrate the hull:
*The sanitary system can either blow or pump to sea through PL-49 (I think I have the correct valve number.)
*The trim system has a blow and flood system to hover. I only used it for training and I used the flood part of the system for a couple of emergency deep executions. There are 4 Aux tanks on a 688. The blow & flood system uses Aux 1 & 2. The remaining portions of the trim system are excluded because they are not normally pressurized to sea. 700lb air is used to pressurize the tank and blow water to sea.
*The trim & drain systems each have hull valves in order to pump to sea. So, that is an additional two valves. I suppose that back-up valves should count as well. Make that an additional 4 valves. If I recall correctly, the flood & blow system anly ties a portion of the trim system. So, it is possible to uses Aux 1 & 2 for flood and blow operations while using the trim pump to pump water from tank to tank or from tank to sea. The reason I bring this up is because during a flooding casualty or any other casualty requiring rapid dewatering of the ship, the trim system can be used to generate some extra buoyancy. Also, the drain system can be cross-connected to dewater trim tanks and vice-versa.
*Emergency Main Ballast Tank Blow System (EMBT.) This system has hull valves actuated from the BCP. The back-up hull valves are always open. The hull valves are normally shut.
*The ship's whistle uses 150lb air in order to function. These hull & back-up valves are manually operated.
*Ship depth guages use hull & back-up valves actuated from the crews mess. 2 valves: hull & back-up.
*The hydraulics for the ships anchor penetrates the hull.
Do mechanical system penetrations count? There are too many for me to remember.
*MBT vent valve linkages penetrate the hull. These valves are hydraulically operated but the hydraulics remain inboard. However, the linkages penetrate the hull. There is also an indicator for each valve: open or shut.
*Mechanical indicators for a variety of hull penetrations themselves penetrate the hull.
*The TDU ball valve has a mechanical indicator.
*Torpedo muzzle doors each have a mechanical indicator.
*Torpedo ejection pump doors have mechanical indicators.
*The torpedo system has an equalization valve. However, I have no recollection whether it had a mechanical indicator.
*Rudder & stern planes use mechanical linkages for normal operations that penetrate the hull. I have since forgotten whether the bow planes or fair water planes use emergency back-up systems that rely on any form of a mechanical linkage back up. But if they do, then these linkages also penetrate the hull.
*Don't forget each 3'' launcher muzzle door has mechanical indicators.
*Many more . . .
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