If the operation of any equipment is necessary to fulfill a requirement of the SSP or the ISPS Code it will be classed as “security equipment” for the purposes of the ISPS Code. This will include “dual use” equipment, even when the equipment’s primary function is not related to security. As an example, deck lighting will probably be classed as security equipment as it is required to effectively monitor deck areas during the hours of darkness. Similarly, communications equipment will be classed as security equipment if it is used for security related communications. Conversely, an internal door lock would not normally be classed as security equipment unless, say, it was also used to control access to a restricted area.