(1) An inspection, with tests when necessary, of the equipment to ensure that requirements relevant to the particular certificate are complied with and that they are in a satisfactory condition and are fit for the service for which the ship is intended; and (2) a check that all the certificates, record books, operating manuals and other instructions and documentation specified in the requirements relevant to the particular certificate are on board the ship. (2011 HSSC Survey Guidelines, 4.4.2)
Paragraph 21 of IMO Guidelines for the Onboard Operational Use of Shipborne Automatic Identification Systems (Resolution A. 917(22) (which is reprinted in MSN 1795) states: AIS should always be in operation when ships are underway or at anchor." There are, however, circumstances in which AIS may be switched off when under way or at anchor.