These craft were 35 m (114 ft 10 in) long and 5.1 m (16 ft 9 in) in beam.[3] Their diesel engines provided a range of 700 to 750 nmi (810–860 mi; 1,300–1,390 km), substantially greater than the gasoline-fueled American PT boats and British Motor Torpedo Boats (MTBs).[4]