The USNS Grasp, a Military Sealift Command rescue and salvage ship, comes to Portland

We're seeing unusual ships arriving in the river this week so far. Yesterday it was the USCGC Healy, the Coast Guard's biggest ship, headed to the Swan Island shipyard.

Today it's the USNS Grasp, a highly specialized rescue and salvage ship, whose job it is to save people and ships when they get in trouble on the water.

Image: the USNS Grasp, photo courtesy of US Navy photo gallery.