Automatic Identification System Shipborne Equipment—Prince William Sound.
Until December 31, 2004, each vessel required to provide automated position reports to a Vessel Traffic Service (VTS) under § 165.1704 of this subchapter must do so by an installed Automatic Identification System Shipborne Equipment (AISSE) system consisting of a:
Twelve-channel all-in-view Differential Global Positioning System (dGPS) receiver;
Marine band Non-Directional Beacon receiver capable of receiving dGPS error correction messages;
VHF—FM transceiver capable of Digital Selective Calling (DSC) on the designated DSC frequency; and
An AISSE must have the following capabilities:
Use dGPS to sense the position of the vessel and determine the time of the position using Universal Coordinated Time (UTC);
Fully use the broadcast type 1, 2, 3, 5, 6, 7, 9, and 16 messages, as specified in RTCM Recommended Standards for Differential NAVSTAR GPS Service in determining the required information;
Achieve a position error which is less than ten meters (32.8 feet) 2 distance root mean square (2 drms) from the true North American Datum of 1983 (NAD 83) in the position information transmitted to a VTS;
Achieve a course error of less than 0.5 degrees from true course over ground in the course information transmitted to a VTS;
Achieve a speed error of less than 0.05 knots from true speed over ground in the speed information transmitted to a VTS;
Receive and comply with commands broadcast from a VTS as DSC messages on the designated DSC frequency;
Receive and comply with RTCM messages broadcast as minimum shift keying modulated medium frequency signals in the marine radiobeacon band, and supply the messages to the dGPS receiver;
Transmit the vessel's position, tagged with the UTC at position solution, course over ground, speed over ground, and Lloyd's identification number to a VTS;
Display a visual alarm to indicate to shipboard personnel when a failure to receive or utilize the RTCM messages occurs;
Display a separate visual alarm which is triggered by a VTS utilizing a DSC message to indicate to shipboard personnel that the U.S. Coast Guard dGPS system cannot provide the required error correction messages; and
Display two RTCM type 16 messages, one of which must display the position error in the position error broadcast.
An AISSE is considered non-operational if it fails to meet the requirements of paragraph (b) of this section.
Vessel Traffic Service (VTS) areas and operating procedures are set forth in part 161 of this chapter
[CGD 90-020, 59 FR 36334, July 15, 1994, as amended by CGD 97-023, 62 FR 33365, June 19, 1997; USCG-2003-14757, 68 FR 39367, July 1, 2003; 68 FR 60569, Oct. 22, 2003]