IMPROVEMENTS IN THE COASTAL HARBOR RADIO TELEPHONE SYSTEM AND THEIR EFFECT ON THE USER
This paper describes recent improvements in the coastal Harbor Radiotelephone System. The major improvement is a noise adaptive land-based receiver which can reliably detect an A3A carrier in a noise environment that varies from a typical low of 40 dB above thermal for quiet locations, to a typical high of 90 dB above thermal for noisy locations. In all cases, the receiver will only be included in the selection process if a usable audio signal is present during the initial ship transmission. New operating procedures are discussed which explain the interaction between the user and the noise adaptive receiver. A typical call sequence is described detailing the system operation during: a) the user's initial transmission when receiver selection occurs, and b) subsequent transmissions when only the selected receiver is on line.
- Symposium Papers presented at RTCM Assembly Meeting April 17-20, 1978, Detroit, Michigan and Windsor, Canada. With the participation of International Association of Great Lakes Ports. Volume I, WARC 79 and Satellites and Advanced Systems.
Radio Technical Commission for Marine Services/Federal Communications Commission
Washington, DC United States 20554
- Chriss, W H
- Publication Date: 1978
- Pagination: 10 p.
- TRT Terms: Coastwise shipping; Communication systems; Harbors; Radio; Radio telephone; Ship pilotage; Telecommunications
- Old TRIS Terms: Coastal navigation; Harbor navigation
- Subject Areas: Marine Transportation; Operations and Traffic Management; Terminals and Facilities;
- Accession Number: 00184771
- Record Type: Publication
- Source Agency: Radio Technical Commission for Marine Services
- Report/Paper Numbers: Paper No. 1.D
- Files: TRIS
- Created Date: Jan 13 1979 12:00AM