Prohibited weapons most commonly find their way onto a ship by being carried on board by embarking personnel. Here follows some examples of security measures to take at different security levels:
- SECURITY Level 1: Verify the reason for personnel seeking access to the vessel by checking tickets, boarding passes, work orders or ID cards. Positively identify crewmembers, passengers, vendors, dock- workers and authorized visitors prior to each embarkation. New crewmembers should be cross-referenced with company on-signers information. Body searches and the inspection of baggage for prohibited weapons, incendiaries and explosives should be carried out on a random basis.
- SECURITY Level 2. Same as SECURITY Level 1, but with an increased inspection frequency on embarking persons.
- SECURITY Level 3. Same as SECURITY Level 2, but all embarking persons must be inspected and all persons except crewmembers must be escorted when onboard.