There should be a system to record the names and purpose of visitors.
All ship’s visitors (including agents and port officials) should have their ID verified on boarding and should be given temporary visitors’ ID tags. At security levels 2 and 3 no visitors should be allowed except for persons providing essential services and shore officials. At security level 3 every visitor should be accompanied by a responsible crew member. Restricted areas on board should be indicated by signs, and should be secured or controlled.