1-48. The detachment’s debarkation location is extremely important. It must start from a known location to execute dead-reckoning navigation. This method applies to surface craft as well as aircraft debarkation. En route to the debarkation point, the detachment members are assigned specific duties and stations. They rehearse debarkation procedures. At the debarkation point, the vessel commander orients the detachment to the BLS with a final update on weather and sea conditions. Once disembarked, the operational success will depend solely on the detachment’s training and maritime skills.