Maersk Line, Limited (MLL), which serves the U.S. government through the operation of flagged shipping vessels, yesterday said it has acquired 3PSC, which builds and operates special mission ships for the Military Sealift Command.

Terms of the deal were not disclosed.

3PSC, which is based in Florida, operates six vessels and has a seventh under construction that is expected to be delivered later this year or early in 2013. Virginia-based MLL has 24 U.S. flag container ships, manages 36 water craft for the Army, has a partnership for the operation of four roll-on and roll-off vessels, and also operates several government-owned special mission ships and maritime prepositioning ships.

“Through the acquisition of 3PSC, MLL will continue its tradition of providing outstanding ship operation and maintenance services to the Military Sealift Command,” John Reinhart, MLL’s president and CEO, said in a statement.

MLL plans to integrate 3PCS operations into its Norfolk, Va., headquarters later this year. 3PSC has about 20 employees and its founder and CEO Gary King will leave the company as part of the deal.