Today we are honoring the liberty ships of ww2 and those who sailed and built them. During ww2 over 2700 liberty ships were built to bring supplies and people back and forth to the war in Europe. They were staffed by civilian merchant mariners not navy or coast guard. These were huge targets and the mariners on the liberty ships has some of the highest death rates despite not getting any of the benefits.
Today there are only two remaining liberty ships in the USA and only one that can move. The John W Brown can still and does still go on voyages under her own power (triple expansion steam engine)