Transferring From Storage to Storage

Transferring From Storage to Service-Cont.

Aviation Boatswains Mate F - Aviation theories and other practices
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process. Should this occur, the transfer operation must be secured until storage tanks concerned have been restripped; a clean, bright, water-free sample is re- ceived on the discharge side of the stripping pump; and the centrifugal purifier is inspected and discrep- ancies are corrected. Transferring From Storage to Storage This operation should rarely be necessary if an emptying sequence was properly established and fol- lowed (except when consolidating the fuel load before receiving). If and when this operation is called for, it will, in most instances, require transferring JP-5 from port to starboard, or vise versa, to correct the list on the ship; or transferring JP-S from forward to aft, or vice versa, to correct the trim on the ship. The operating procedure for this operation is the same as transferring from storage to service with the following exceptions: 1. Purification and sampling procedures are not required. 2. The transfer piping from the discharge header of the transfer pumps is aligned to discharge into the opposite transfer main branch header, from which suc- tion is being taken (when transferring from port to starboard, or vice versa), or to the transfer main (when transferring from forward to aft, or vice versa). CAUTION The overflow tank for any nest of tanks scheduled to receive fuel must be empty before JP-5 can be transferred into any tank in that nest. Consolidating Fuel When any transfer operation has been completed, consolidate to the greatest extent possible the last 24 inches of JP-5 remaining in the storage tanks. (As much as 5,000 gallons remain in some of the larger tanks after the transfer pumps lose suction.) This consolidation must be accomplished by the motor- driven stripping pump. The procedure for consolidating the last 24- inches of JP-5 is the same as that outlined for strip- ping, except that the stripping pump discharge header is aligned to direct the discharged fuel into the transfer main instead of the contaminated-JP-5 settling tank. From the transfer main, the JP-5 is directed into preselected storage tanks. Consolidated fuel should be allowed maximum settling time before it is stripped before use. Ballasting Operation The empty ballast storage tanks are ballasted (filled with sea water) to preserve the underwater protection system of the ship. Ballasting must be ac- complished in accordance with current ship’s ballast- ing instruction for each ship. Tanks on CV/CVNs are ballasted by gravity through the sea chest valve on the flood and drain manifold and the single-valved stripping manifold. On LPHs and LPDs this water is supplied from the ship's fire main system. Ballasting procedure is as follows: 1. Follow the tank falling sequence as scheduled by damage control central to maintain the proper list and trim of the ship. 2. Open the valves on the single-valved stripping manifold to the tanks to be filled. CAUTION Open an equal number of tanks on the opposite side of the ship. NOTE ALL tanks that are served by one flood and drain manifold can be filled simultaneously. 3. Align the valves on the flood and drain mani- fold for ballasting. a. Unlock the sliding lock bar by loosening the two bolts over the oblong slots. b. Position the lock bar so the circular hole in the keyhole slot is directly above the raised collar on the sea chest valve stem. 4. 5. are full. c. Rebolt the lock bar in position. Open the sea chest valve. Sound the tanks to determine the instant they 4-70

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