Saving submariners – rise of the ROVs

A US Navy diver waits in the transfer skirt of the submarine rescue diving and recompression system's (SRDRS) pressurized rescue module (PRM), Falcon, for the hatch to open aboard the Portuguese Navy submarine SSK Tridente (S 70) during Nato's 'Bold Monarch' joint exercise in 2011. Image courtesy of the US Navy.