Sec. 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 Secs. 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 Sec. 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 communications 
using direct-printing telegraphy;
    (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 MHz (this 
requirement may be fulfilled by the 406 MHz EPIRB required by 
Sec. 80.1085(a)(6), either by installing the 406 MHz 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.
    (b) In addition to meeting the requirements of Sec. 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:

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    (i) Through the polar orbiting satellite service on 406 MHz (this 
requirement may be fulfilled by the 406 MHz EPIRB required by 
Sec. 80.1085(a)(6), either by installing the 406 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.