§ 80.103   Digital selective calling (DSC) operating procedures.

   (a) Operating procedures for the use of DSC equipment in the maritime mobile
   service are as contained in ITU-R M.541-9 (incorporated by reference, see
   § 80.7), and subpart W of this part.

   (b) When using DSC techniques, coast stations and ship stations must use
   maritime mobile service identities (MMSI) assigned by the Commission or its
   designees.

   (c) DSC acknowledgment of DSC distress and safety calls must be made by
   designated coast stations and such acknowledgment must be in accordance with
   procedures  contained in ITU-R M.541-9 (incorporated by reference, see
   § 80.7). Nondesignated public and private coast stations must follow the
   guidance  provided for ship stations in ITU-R M.541-9 (incorporated by
   reference, see § 80.7), with respect to DSC “Acknowledgment of distress
   calls” and “Distress relays.” (See subpart W of this part.)

   (d) Group calls to vessels under the common control of a single entity are
   authorized. A group call identity may be created from an MMSI ending in a
   zero, assigned to this single entity, by deleting the trailing zero and
   adding a leading zero to the identity.

   [ 68 FR 46961 , Aug. 7, 2003, as amended at  73 FR 4480 , Jan. 25, 2008;  76 FR 67610 , Nov. 2, 2011]

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