What is the difference between a "security drill" and a "security exercise" under the ISPS Code, and how often must each be carried out?

A. Security exercises are only required for passenger ships, not cargo ships

B. They are the same activity, just with different names, and both must occur monthly

C. A security drill involves the ship's crew only and should be carried out at least every three months (and within one week if more than 25% of the crew has changed), while a security exercise involves wider participation (e.g. the Company Security Officer, port facility, or relevant authorities) and must be held at least once per calendar year, with intervals between exercises not exceeding 18 months

D. Security drills are only required after a security incident has occurred

A. Security levels only apply to passenger vessels

B. No action needed until the vessel actually arrives in port

C. Only the Master needs to be informed; no operational changes are required

D. Implement the additional security measures specified in the Ship Security Plan for Security Level 2 (e.g. increased monitoring of restricted areas, additional checks on visitors/stores, more frequent security patrols) before arrival, and acknowledge/report the change as required

A. To give crew somewhere private to relax

B. To control access to areas where security-sensitive information, equipment, or cargo is held (e.g. bridge, engine room, security equipment stores), preventing unauthorised access that could compromise the security of the ship, crew, passengers or cargo

C. They are purely for fire safety, unrelated to security

D. Restricted areas are only required on vessels carrying dangerous goods