Source : Webster's Revised Unabridged Dictionary (1913)

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.

   2. The compensation made or allowed to a pilot.

   3. Guidance, as by a pilot. --Sir W. Scott.

Source : WordNet®

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