Defense Tech: Sea Swap = More Bang for Your Buck


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Edited by Christian Lowe \| Contact

Sea Swap = More Bang for Your Buck

For decades, the Navy has assigned two crews apiece to its ballistic missile subs, or "boomers". One crew is out at sea in the sub while the other is training and resting back home. The idea is that double crews let you squeeze more sailing days out of your ships. Boomers are ideally suited because they sail on rigid schedules that let you plan rotations far in advance.

In 2004, with the fleet shrinking and ships in high demand on the Pacific and in the Persian Gulf, the Navy launched a program to double-crew several destroyers. The ships stayed at sea while crews flew out to man them on six-month rotations. This saved months of sailing time by eliminating the need to bring a ship home just so the crew could rest.

The program, called Sea Swap, was a qualified success. Crews bitched about losing that sense of ownership that comes with being a ship's sole crew. Morale was an issue. But in operational terms, Sea Swap worked: three destroyers could do the work of five by staying on station longer, avoiding long ocean transits and saving on wear and tear.

The Navy announced two weeks ago that it is ending Sea Swap as an experiment. It will study the results and decide whether and how to apply the lessons learned to future classes of ships like the LCS and DDG-1000 (formerly DD(X)).

In the meantime, the Navy's smallest fighting ships have permanently adopted a Sea Swap model. Once upon a time, the eight-ship class of coastal patrol boats (PCs) was scheduled for disposal, but now they're in high demand in shallow "green" waters like those of the Persian Gulf, as I write in the current National Defense Magazine:

Last year, recognizing the utility of these craft in green waters, the Navy halted all efforts to dispose of the remaining boats and even began negotiations with the Coast Guard to take back transferred PCs. The Navy moved two West Coast-based boats to Little Creek, a move that consolidated all operations and training at the Virginia base. At any given time, three boats are at Little Creek for drydocking and training while the rest remain forward deployed. Thirteen 30-person PC crews that are based at Little Creek fly out to the Fifth Fleet in the Persian Gulf, on six-month rotations.

Sea swapping effectively nearly doubles the size of your fleet without adding any new hulls. Expect the future Navy to do with all its ships what it has done with boomers, destroyers and PCs, cheaply turning 300 ships into 500.

Check out some of my patrol boat pictures at Flickr.

--David Axe

P.S. -- Check out one of several recent reviews of my graphic novel WAR FIX!

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Posted by: mesos at August 8, 2008 10:32 PM

I would be interested in understanding more of the boomer concept of crew rotation being inherently married to its maintenance and logistics plan. Is asterix available to discuss.

Posted by: kramer at October 4, 2006 02:01 PM

Then do your exchanges in blue-water. If you didn't have Sea Swap they'd still sink your boat in the middle of nowhere, they just wouldn't take out both crews.

Posted by: Charles at May 28, 2006 12:09 PM

This will work, until we face an enemy with an airforce or a strong surface to air capability. Then, we will be short many ships of the fleet.

Posted by: Bruce Lee at May 25, 2006 12:11 PM

Return to port might allow one to assess the vessel for damage that might not otherwise be visible to a vessel's crew. There's also resupply, but that's doable by sea, as is crew replacement.

Sea Swap will work, but it may come at the cost of maintainence.

Posted by: Charles at May 25, 2006 10:52 AM

Crew rotation has also been used, beginning in 1996, on the U.S. Navy's Avenger-class mine countermeasures ships based in Bahrain. The ships stay in the Persian Gulf and a new crew flies out from their Texas homeport every six months.

Posted by: Brad at May 25, 2006 08:25 AM

Saying that doubling up crews doubles available op tempo isn't really true. SSBNs have an entire logistics system built around them to allow the double crews to keep them at sea. This includes supply and repair elements that simply aren't there for anything else. The TRIDENT system is unique; a boomer spends its time in ports tended by both crews just to get it ready to go to sea again, and the availability of parts and services for a TRIDENT just isn't there for any other vessel. Merely swapping another set of bodies on a ship doesn't make it seaworthy and combat-ready for another deployment. If the Navy's serious about this they need to implement a variety of logistics measures to keep the ships suppplied and maintained in tip-top shape, and right now they don't sem to be doing it, which amounts to all that more work for the boys in blue and totally fails as a substitute for another actual battle-ready hull.

Posted by: Asterix at May 25, 2006 01:33 AM

Sea Swap = More Bang for Your Buck

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