. . . comes from the same source as Relief Crew 17, Seth Tane, whose most recent work is called Sea Train.  Back in the summer of 2014, Blue Marlin brought in a dry dock named Vigorous–the largest in the US.  It came on the back of Blue Marlin from ZPMC.  That dry dock is now working, and below you see its current load, USNS T-AH-19 Mercy.  Yes, mercy!!  Here are some previous iterations of Mercy.

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Photo by Seth Tane, although I tinkered with it a bit.

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More Mercy here.

Click here (and scroll) to see sister hospital vessel Comfort in a post I did five years ago.