'Steerageway' definitions:

Definition of 'steerageway'

(from WordNet)
noun
(nautical) the minimum rate of motion needed for a vessel to be maneuvered

Definition of 'Steerageway'

From: GCIDE
  • Steerageway \Steer"age*way`\ (-w[=a]`), n. (Naut.) A rate of motion through the water sufficient to render a vessel governable by the helm. [1913 Webster]