Markham, G.A. 1990. The Panama Canal Pilot. Balboa, Panama: Panama Canal Commission.
Meurn, R.J. 1990. Watchstanding Guide for the Merchant Officer. Centreville, Maryland: Cornell Maritime Press.
NRC (National Research Council). 1992. Shiphandling Simulation: Application to Waterway Design. W. Webster, ed. Committee on Shiphandling Simulation, Marine Board. Washington, D.C.: National Academy Press.
NRC (National Research Council). 1994. Minding the Helm: Marine Navigation and Piloting. Committee on Advances in Navigation and Piloting, Marine Board. Washington, D.C.: National Academy Press.
PCC (Panama Canal Commission). 1993. The Panama Canal Pilot Training Programs. Unbound compilation of pilot training program materials. Balboa, Republic of Panama: PCC.