The engine room and adjacent machinery spaces are designated as a "restricted area" under the vessel's Ship Security Plan. What is the main reason for this designation, and what does it require in practice?

A. Restricted areas only apply to spaces containing classified government cargo

B. The designation only takes effect when the ship is underway, not in port

C. It is purely a safety designation with no security purpose, and the SSP reference is incidental

D. Restricted areas are designated to prevent unauthorised access to spaces where interference (e.g. tampering with machinery, propulsion, or systems) could endanger the ship, its crew, cargo, or the environment, or where access could be used to conceal a person or item; in practice this means access is limited to authorised crew/contractors, entry points may require keys, codes, or escort, and unfamiliar persons found in these spaces should be challenged and reported

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