Santa's new sleigh

A crew member dressed as Santa rides atop the hull as the Virginia-class attack submarine PCU South Dakota (SSN 790) transits the Thames River off Groton en route to the U.S. Navy Submarine Base in Groton Thursday, December 20, 2018 after a month out on Sea Trials. The South Dakota, which carries the Pre-Commissioning Unit designation instead of USS until commissioning in February of 2019, is the 17th boat in the class, the seventh in the Block III design series.  (Sean D. Elliot/The Day)
A crew member dressed as Santa rides atop the hull as the Virginia-class attack submarine PCU South Dakota (SSN 790) transits the Thames River off Groton en route to the U.S. Navy Submarine Base in Groton Thursday, December 20, 2018 after a month out on Sea Trials. The South Dakota, which carries the Pre-Commissioning Unit designation instead of USS until commissioning in February of 2019, is the 17th boat in the class, the seventh in the Block III design series. (Sean D. Elliot/The Day)

Groton — The Virginia-class attack submarine PCU South Dakota (SSN 790) returned to the U.S. Navy Submarine Base after a month out on sea trials. The South Dakota, which carries the Pre-Commissioning Unit designation instead of USS until commissioning in February of 2019, is the 17th boat in the class, the seventh in the Block III design series.

Santa rides atop the hull as the Virginia-class attack submarine PCU South Dakota (SSN 790) transits the Thames River off Groton en route to the U.S. Navy Submarine Base in Groton Thursday, December 20, 2018.  (Sean D. Elliot/The Day)
Santa rides atop the hull as the Virginia-class attack submarine PCU South Dakota (SSN 790) transits the Thames River off Groton en route to the U.S. Navy Submarine Base in Groton Thursday, December 20, 2018. (Sean D. Elliot/The Day)
A crew member dressed as Santa rides atop the hull as the Virginia-class attack submarine PCU South Dakota (SSN 790) transits the Thames River off Groton en route to the U.S. Navy Submarine Base in Groton Thursday, December 20, 2018 after a month out on Sea Trials. The South Dakota, which carries the Pre-Commissioning Unit designation instead of USS until commissioning in February of 2019, is the 17th boat in the class, the seventh in the Block III design series.  (Sean D. Elliot/The Day)
A crew member dressed as Santa rides atop the hull as the Virginia-class attack submarine PCU South Dakota (SSN 790) transits the Thames River off Groton en route to the U.S. Navy Submarine Base in Groton Thursday, December 20, 2018 after a month out on Sea Trials. The South Dakota, which carries the Pre-Commissioning Unit designation instead of USS until commissioning in February of 2019, is the 17th boat in the class, the seventh in the Block III design series. (Sean D. Elliot/The Day)

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