MV Grey Lady is a high speed catamaran ferry operated by Hy-Line Cruises that travels on a route between Hyannis and Nantucket.
The vessel was designed by Incat Crowther and ordered from Gladding-Hearn Shipbuilding in February 2002.
[2] She is the third Incat ferry to be operated by Hy-Line, preceded by Grey Lady II (now Lady Martha) and succeeded by Grey Lady IV.
Her speed comes from four KTA50M2 Cummins diesel engines spinning four Hamilton water jets through Reinjtes gearboxes.
[4] The engines can propel her at up to 38 knots (44 mph), though her normal service speed is 31 knots (36 mph).