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]

Moby Thesaurus II by Grady Ward, 1.0:

107 Moby Thesaurus words for "pilotage":
   admission, admission fee, aeronautics, air service, airline,
   anchorage, aspect, astronautics, astronavigation, attitude,
   authority, aviation, azimuth, ballooning, bearing, bearings,
   blind flying, brokerage, carfare, celestial navigation, cellarage,
   charge, charges, chronometer, cloud-seeding, coastwise navigation,
   command, commercial aviation, conduct, consolan, contact flying,
   control, cover charge, cruising, dead reckoning, demand, direction,
   dockage, dues, entrance fee, exaction, exactment, exposure, fare,
   fee, fix, flight, flying, frontage, general aviation, gliding,
   governance, government, guidance, handling, helmsmanship, hire,
   husbandry, lay, lead, leading, license fee, lie, line of position,
   loran, management, managery, managing, manipulation, ordering,
   orientation, pilotry, pilotship, plane sailing,
   point-to-point navigation, portage, position, position line, radar,
   radio beacon, radio bearing, radio navigation, regulation, running,
   sailing, sailplaning, salvage, scot, scot and lot, set, sextant,
   shoran, shot, soaring, sofar, sonar, steerage, steering, storage,
   tables, the conn, the helm, the wheel, toll, towage, wharfage,
   winging



Bouvier's Law Dictionary, Revised 6th Ed (1856):

PILOTAGE, contracts. The compensation given to a pilot for conducting a
vessel in or out of port. Poth. Des Avaries, n. 147.
     2. Pilotage is a lien on the ship, when the contract has been made by
the master or quasi master of the ship, or some other person lawfully
authorized to make it; 1 Mason, R. 508; and the admiralty court has
jurisdiction, when services have been performed at sea. Id.; 10 Wheat. 428;
6 Pet. 682; 10 Pet. 108; and see 1 Pet. Adm. Dec. 227.