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Military Sealift Command Pacific (MSCPAC)
Sealift Logistics Command Pacific (SEALOGPAC)

Military Sealift Command Pacific (MSCPAC), located in San Diego, California, serves as MSC's representative and operating authority in the Eastern Pacific Ocean, exercising operational control of MSC's Combat Logistics Force ships while supporting all 4 MSC shipping programs from the West Coast to the international date line. MSCPAC coordinates ship schedules, cargo operations, port services and force protection arrangements for all MSC ships calling in Navy Regions Southwest, Northwest and Hawaii.

As of 2011, MSCPAC's operational area of responsibility covered more than 50 million square miles in the Eastern Pacific, coinciding with that of the Navy's Third Fleet.

MSCPAC was established in 1949 as Military Sea Transportation Service West, and was originally located at the Fleet Industrial Supply Center in Oakland, California. In 1998, what had become known as Military Sealift Command Pacific (MSCPAC) relocated to its present location in San Diego at Naval Base Point Loma. This relocation was in response to a restructuring done in 1996 as well as the closure of its former base of operations in Oakland, California.

Prior to 2005, MSCPAC, headquartered in San Diego, California on the Point Loma Submarine Base supports MSC ships and crews conducting combat support, sealift and special mission operations at sea. The unit was co-located with Naval Fleet Auxiliary Force West and had a combined staff of 220 military and civilian employees. The Commander, MSCPAC (COMSCPAC) was also the Naval Fleet Auxiliary Force West Project Officer. Duties included management of the Naval Fleet Auxiliary Force (NFAF) ships assigned, as well as administrative support to other Military Sealift Command programs and activities.

At that time, the primary operational area of responsibility was the Eastern Pacific, coinciding with that of the US Navy's Third Fleet. MSCPAC also provided engineering and personnel support to the forward-deployed NFAF ships operating with the Fifth and Seventh Fleets in the Western Pacific, Indian Ocean and Persian Gulf.

The San Diego complex not only included the normal departments associated with a major command (i.e., operations, logistics, engineering, comptroller, administration, personnel, etc.), but also a modern training site and a firefighting school. MSCPAC also maintained a Military Sealift Command Office in Pearl Harbor, Hawaii; Military Sealift Command representatives in San Francisco, California, and Seattle, Washington; and a Military Sealift Command Detachment in Anchorage, Alaska. These remote offices provided husbanding services for Military Sealift Command ships and served as Military Sealift Command liaison to the various military commands in their respective areas. Six US Naval Reserve units were assigned to MSCPAC at that time. These units were frequently called upon to support operations throughout the MSCPAC area of responsibility.

On 16 February 2005, Military Sealift Command Pacific became Sealift Logistics Command Pacific (SEALOGPAC) as part of Military Sealift Command's global transformation. SEALOGPAC primarily supported US Third Fleet. In 2011, as part of another transformation effort, the command was renamed back to Military Sealift Command Pacific (MSCPAC).

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