Range is listed as
4,120 nmi (7,630 km; 4,740 mi) at 14 knots (26 km/h; 16 mph)
As she has no where to refuel
Also its even worse
"By the evening of 6 August, despite the help of 400 volunteers from the merchantmen, he had only taken on 1,500 short tons (1,400 t) which was...