The Collaborative International Dictionary of English v.0.48:

Pilotage \Pi"lot*age\, n. [Cf. F. pilotage.]
   1. The pilot's skill or knowledge, as of coasts, rocks, bars,
      and channels. [Obs.] --Sir W. Raleigh.
      [1913 Webster]

   2. The compensation made or allowed to a pilot.
      [1913 Webster]

   3. Guidance, as by a pilot. --Sir W. Scott.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pilotage
    n 1: the guidance of ships or airplanes from place to place
         [syn: navigation, pilotage, piloting]
    2: the occupation of a pilot [syn: piloting, pilotage]