The safety/calling channel's traditional voice watch, particularly the voice Alert, is analyzed in comparison with the use, instead, of tone signal Alerts for distress and urgency calls. It is shown that the voice Alert has serious weaknesses under modern-day channel loading conditions while, by contrast, a tone signal Alert would be highly attention-calling through even the worst likely channel "clutter". The requirements of a suitable tone signal Alert are researched and a practical system concept is described. With a forthcoming study and demonstration expected to prove the complete practicality of the tone signal Alert and its marked superiority in effectiveness compared with the voice Alert, prompt and aggressive action is urged to obtain United States and International recognition of the tone signal Alert's superiority and to provide for its universal use in replacement of the seriously outdated and relatively ineffective voice Alert.

  • Supplemental Notes:
    • Symposium Papers, RTCM St. Louis Assembly Meeting, April 28-30, 1975, with the participation of Water Resources Congress. Volume I - Marine Radio Telephony.
  • Corporate Authors:

    Radio Technical Commission for Marine Services

    P.O. Box 19087
    Washington, DC  United States  20036
  • Authors:
    • Herrick, R H
  • Publication Date: 1975-4

Media Info

  • Pagination: 9 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00127031
  • Record Type: Publication
  • Source Agency: Radio Technical Commission for Marine Services
  • Files: TRIS
  • Created Date: Nov 5 1975 12:00AM