§ 80.1091   Ship radio equipment—Sea areas A1, A2, and A3.

   This section contains the additional equipment requirements for ships that
   remain  within  sea areas A1, A2, or A3 at all times. Ships fitting in
   accordance with this section satisfy the requirements denoted in § 80.1087 or
   § 80.1089  for sea-areas A1 and A2. Ships fitting in accordance to this
   section have the option to comply with either the requirements of paragraph
   (a) or (b) of this section.

   (a) In addition to meeting the requirements of § 80.1085, ships subject to
   this section must be provided with:

   (1) An INMARSAT ship earth station capable of:

   (i) Transmitting and receiving distress and safety data communications;

   (ii) Initiating and receiving distress priority calls;

   (iii) Maintaining watch for shore-to-ship distress alert, including those
   directed to specifically defined geographical areas;

   (iv) Transmitting and receiving general radiocommunications, using either
   radiotelephony or direct-printing telegraphy; and

   (2) An MF radio installation capable of transmitting and receiving, for
   distress and safety purposes, on the frequencies:

   (i) 2187.5 kHz using DSC; and

   (ii) 2182 kHz using radiotelephony; and

   (3) A radio installation capable of maintaining a continuous DSC watch on
   the frequency 2187.5 kHz which may be separate from or combined with that
   required by paragraph (a)(2)(i) of this section; and

   (4) Means of initiating the transmission of ship-to-shore distress alerts by
   a radio service operating either:

   (i) Through the polar orbiting satellite service on 406.0-406.1 MHz (this
   requirement may be fulfilled by the EPIRB required by § 80.1085(a)(6), either
   by installing the EPIRB close to, or by allowing remote activation from, the
   position from which the ship is normally navigated); or

   (ii) On HF using DSC: or

   (iii) Through the INMARSAT geostationary satellite service, by an additional
   ship earth station.

   Note to paragraph (a)(4)(iii): For ships subject to this subpart, sailing
   only  in  domestic waters, alternative satellite system fitting may be
   considered.  However, the satellite system fitted must comply with all
   features of the INMARSAT system for its intended function. These are shown
   in  IMO  Resolution  A.801(19)  and in IMO Resolution A.1001(25) (both
   incorporated  by  reference,  see § 80.7). In any case, the alternative
   satellite system must provide continuous coverage for all sea areas in which
   the ship intends to sail.

   (b) In addition to meeting the requirements of § 80.1085, ships subject to
   this section must be provided with:

   (1) An MF/HF radio installation capable of transmitting and receiving on all
   distress and safety frequencies in the bands between 1605-27500 kHz using
   DSC, radiotelephony, and narrow-band direct-printing telegraphy; and

   (2) Equipment capable of maintaining DSC watch on 2187.5 kHz, 8414.5 kHz and
   on at least one of the distress and safety DSC frequencies 4207.5 kHz, 6312
   kHz, 12577 kHz, or 16804.5 kHz although it must be possible to select any of
   these DSC distress and safety frequencies at any time (this equipment may be
   separate from, or combined with, the equipment required by paragraph (b)(1)
   of this section); and

   (3) Means of initiating the transmission of ship-to-shore distress alerts by
   a radiocommunication service other than HF operating either:

   (i) Through the polar orbiting satellite service on 406.0-406.1 MHz (this
   requirement  may be fulfilled by the 406.0-406.1 MHz EPIRB required by
   § 80.1085(a)(6), either by installing the 406.0-406.1 MHz EPIRB close to, or
   by allowing remote activation from, the position from which the ship is
   normally navigated); or

   (ii) Through the INMARSAT geostationary satellite service (this requirement
   may be fulfilled by an INMARSAT ship earth station).

   (4) In addition, ships must be capable of transmitting and receiving general
   radiocommunications using radiotelephony or direct-printing telegraphy by an
   MF/HF radio installation operating on working frequencies in the bands
   between 1605-4000 kHz and between 4000-27500 kHz (this requirement may be
   fulfilled by the addition of this capability to the equipment required by
   paragraph (b)(1) of this section).

   (c) It must be possible to initiate transmission of distress alerts by the
   radio installations specified in paragraphs (a)(1), (a)(2), (a)(4), (b)(1),
   and (b)(3) of this section from the position from which the ship is normally
   navigated.

   [ 57 FR 9065 , Mar. 16, 1992, as amended at  68 FR 46977 , Aug. 7, 2003;  69 FR 64680 , Nov. 8, 2004;  73 FR 4490 , Jan. 25, 2008;  76 FR 67617 , Nov. 2, 2011]

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