Source : Webster's Revised Unabridged Dictionary (1913)

Captainship \Cap"tain*ship\, n.
   1. The condition, rank, post, or authority of a captain or
      chief commander. ``To take the captainship.'' --Shak.

   2. Military skill; as, to show good captainship.

Source : WordNet®

captainship
     n : the post of captain [syn: {captaincy}]