The Submarine Extended Operational Cycle (SEOC) forecast is the critical first step toward material availability.
The SEOC forecasting effort alerts the supply system to include upcoming maintenance requirements in preparation for the receipt of shipyard and maintenance activity requisitions. During the Submarine Extended Operating Cycle (SEOC), Submarine Maintenance Engineering Planning and Procurement (SUBMEPP) forecasts Depot and Intermediate maintenance material six years in advance for Virginia Class Submarines.
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Lt. Vincente Price and the Code 83 Team. (Photo by Jim Morrow)
This process begins with the SUBMEPP's Class Maintenance Plan (CMP), which identifies the Maintenance Requirement (MR), periodicity and configuration information, including the applicable Maintenance Standard (MS). SUBMEPP's forecasting program merges data from the CMP, MS piece parts list -- including stock numbers -- and ship availability schedules to produce a quarterly piece-part forecast.
SUBMEPP provides the material forecast to NAVSUP Weapon Systems Support (WSS) and Defense Logistics Agency (DLA) for needed supply support.
The NAVSUP WSS Integrated Weapon Systems Support Team (IWST) works with the Program Office, NAVSEA, Government In-Service Engineering Agent (ISEA), and Electric Boat (EB) Corps representatives to support the necessary requirements for Virginia Class Submarine Extended Dry-docking Selected Restricted Availabilities (EDSRA). NAVSUP WSS Maritime Industrial Support works with Supply Planners and Procurement Specialists to mitigate difficulties with obtaining material in this ongoing effort.
A Selected Restricted Availability (SRA) is an availability scheduled by the Chief of Naval Operations for the accomplishment of repairs and selected alterations by industrial activities, sometimes coinciding with intermediate level maintenance. These short, labor-intensive availabilities are assigned to accomplish work that is required to sustain the material condition of the ship between overhauls, particularly those ships on extended operating cycles. They are scheduled sufficiently in advance to ensure advanced planning time and funds are effectively used.
NAVSUP WSS has shipped more than 75 percent of the material ordered in support of the USS Virginia (SSN 774) and USS Texas (SSN 775) EDSRA’s within 120 days. Portsmouth, N.H., Naval Shipyard and Pearl Harbor, Hawaii, Naval Shipyard submitted 3,514 requisitions for 1,359 line items from NAVSUP WSS to support the USS Texas and USS Virginia EDSRA’s. The NAVSUP WSS Team shipped more than 95 percent of the requisitions ordered for the USS Virginia EDSRA and shipped more than 77 percent of the requisitions ordered for the USS Texas EDSRA in 120 days or less.
Virginia Class submarines are designed to dominate the world’s littoral and deep waters, while conducting anti-submarine; anti-surface ship; strike; special operation forces; intelligence, surveillance, and reconnaissance; irregular warfare; and mine warfare missions. Their inherent stealth, endurance, firepower, and sensor suite directly enable them to support five of the six maritime strategy core capabilities – sea control, power projection, forward presence, maritime security, and deterrence.
The completion of submarine availabilities is critical in the maintenance of today’s Fleet, and is essential to supporting the Maritime Strategy.
The EDSRA is a nearly two-year-long project that requires placing the submarine in dry dock to perform maintenance and modernization on certain shipboard systems. Virginia Class submarine EDSRA’s are larger, more complex projects because workers will execute many jobs in the work package for the first time.
By Lt. Vincente Price, SC, USN; Military Lead for Maritime Industrial Support, NAVSUP Weapon Systems Support