2 Functionality
2.1 The system should be copable of operating in a number of modes:
.1 an "autonomous and continuous" mode for operation in all areas. This mode should be capable of being switched to/from one of the following altemate modes by a competent authority;
.2 an "assigned" mode for operation in an area subject to a competent authority responsible for traffic monitoring such that the data transmission interval and/or time slots may be set remotely by that authority; and
.3 a "polling" or controlled mode where the data transfer occurs in response to interrogation from a ship or competent authority.
3. Capability
3.1 The AIS should comprise:
.1 a communication processor, capable of operating over a range of maritime frequencies, with an appropriate channel selecting and switching method, in support of both short and long range applications;
.2 a means of processing data from an electronic position-fixing system which provides a resolution of one ten thousand of a minute of are and uses the WGS-84 datum.;
.3 a means to automatically input data from other sensors meeting the provisions as specified in paragragh 6.2;
.4 a means to input and retrieve data manually;
.5 a means of error checking the transmitted and received data; and
.6 built in test equipment (BITE).
