Once a drug consignment has entered a region, traffickers and their agents have little difficulty in moving it within that region, taking advantage of governments to facilitate the movement of persons and goods across frontiers. Shipping is vulnerable to drug trafficking on two fronts. Firstly, the threat of drugs being concealed on vessels means that the enforcement efforts of Customs authorities can result in delays to ships and cargoes. Secondly, the possible involvement of crew members in drug abuse threatens the safety of the vessel. ISBN 1 85609 061 2