5 Failure Warnings and Status Indications
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.74(69) - Adoption of New and Amended Performance Standards - (Adopted on 12 May 1998) - Annex 1 - Recommendation on Performance Standards for Shipborne Combined GPS/GLONASS Receiver Equipment - 5 Failure Warnings and Status Indications

5 Failure Warnings and Status Indications

  5.1 The equipment should provide an indication if the position calculated is likely to be outside of the requirements of these performance standards.

  5.2 The combined GPS/GLONASS receiver equipment should provide as a minimum:

  • .1 an indication within 5 s if either:

    • a) the specified HDOP has been exceeded; or

    • b) a new position has not been calculated for more than 1 s.

    Under such conditions the last known position and the time of the last valid fix, with explicit indication of this state, so that no ambiguity can exist, should be output until normal operation is resumed;

  • .2 a warning of loss of position; and

  • .3 DGPS and DGLONASS status indication of:

    • a) the receipt of DGPS and DGLONASS signals; and

    • b) whether DGPS and DGLONASS corrections are being applied to the indicated ship's position.

Parent topic: Annex 1 - Recommendation on Performance Standards for Shipborne Combined GPS/GLONASS Receiver Equipment
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