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GMDSS Handbook
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Annex - 9-3
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Mob-87
ARTICLE N 38
Mob-87
Frequencies for Distress and Safety Communications for the Global Maritime Distress and Safety System (GMDSS) Mob-87 Section I. Availability of Frequencies
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N 2967 Mob-87
A. 490 kHz
N 2968 Mob-87 з 1. In the maritime mobile service, after full implementation of the GMDSS the frequency 490 kHz will be used exclusively for the transmission by coast stations of meteorological and navigational warnings and urgent information to ships, by means of narrow-band direct-printing telegraphy (see Resolution 210 (Mob-87)).
N 2969 Mob-87
B. 518 kHz
N 2970 Mob-87 з 2. In the maritime mobile service, the frequency 518 kHz is used exclusively for the transmission by coast stations of meteorological and navigational warnings and urgent information to ships, by means of narrow-band direct-printing telegraphy (inter- national NAVTEX system) (see Article 14A).
N 2971 Mob-87
C. 2174.5 kHz
N 2972 Mob-87 з 3. The frequency 2 174.5 kHz is used exclusively for distress and safety traffic using narrow-band direct-printing telegraphy.
N 2973 Mob-87
D. 2182 kHz
N 2974 Mob-87 з 4. The carrier frequency 2182 kHz is used for distress and safety traffic by radiotelephony, using class of emission J3E (see also Nos. 2973, 3026 and 4343).
N 2975 Mob-87
E. 2187.5 kHz
N 2976 Mob-87 з 5. The frequency 2 187.5 kHz is used exclusively for distress and safety calls using digital selective calling in accordance With No. N 3110 (see Nos. N 3112, N 3206 and N 3229).
N 2977 Mob-87
F. 3023 kHz
N 2978 Mob-87 з 6. The, aeronautical carrier (reference) frequency 3023 kHz may be used for intercommunication between mobile stations when they are engaged in co-ordinated search and rescue operations, and for communication between these stations and participating land stations, in accordance with the provisions of Appendix 27 Aer2 (see Nos. 501 and 505).
N 2979 Mob-87
G. 4125 kHz
N 2980 Mob-87 з 7. (1) The carrier frequency 4 125 kHz is used for distress and safety traffic by radiotelephony (see also Nos. 2982 and 4375).
N 2981 Mob-87 (2) The carrier frequency 4 125 kHz may be used by aircraft stations to communicate with stations of the maritime mobile service for distress and safety purposes, including search and rescue (see No. N 2944).
N 2982 Mob-87
H. 4177.5 kHz
N 2983 Mob-87 з 8. The frequency 4 177.5 kHz is used exclusively for tress and safety traffic using narrow-band direct-printing telegraphy.
N 2984 Mob-87
I. 4207.5 kHz
N 2985 Mob-87 з 9. The frequency 4 207.5 kHz is used exclusively for distress and safety calls using digital selective calling in accordance with No. N 3110 (see Nos. N 3112, N 3206 and N 3229).
N 2986 Mob-87
J. 4209.5 kHz
N 2987 Mob-87 з 10. In the maritime mobile service, the frequency 4209.5 kHz is used exclusively for NAVTEX-type transmissions by coast stations of meteorological and navigational warnings and urgent information to ships, by means of narrow-band direct-printing telegraphy (see Resolution 332 (Mob-87)).
N 2988 Mob-87
K. 4210 kHz
N 2989 Mob-87 з 11. The frequency 4210 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 2990 Mob-87
L. 5680 kHz
N 2991 Mob-87 з 12. The aeronautical carrier (reference) frequency 5680 kHz may be used for intercommunication between mobile stations when they are engaged in co-ordinated search and rescue operations and for communication between these stations and participating land stations, in accordance with the provisions of Appendix 27 Aer2 (see also Nos. 501 and 505).
N 2992 Mob-87
M. 6215 kHz
N 2993 Mob-87 з 13. The carrier frequency 6215 kHz is used for distress and safety traffic by radiotelephony (see also Nos. 2986 and 4375).
N 2994 Mob-87
N. 6268 kHz
N 2995 Mob-87 з 14. The frequency 6268 kHz is used exclusively for distress and safety traffic using narrow-band direct-printing telegraphy.
N 2996 Mob-87
O. 6312 kHz
N 2997 Mob-87 з 15. The frequency 6 312 kHz is used exclusively for distress and safety calls using digital selective calling in accordance with No. N 3110 (see Nos. N 3112, N 3206 and N 3229).
N 2998 Mob-87
P. 6314 kHz
N 2999 Mob-87 з 16. The frequency 6314 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 3000 Mob-87
Q. 8291 kHz
N 3001 Mob-87 з 17. The carrier frequency 8291 kHz is used exclusively for distress and safety traffic by radiotelephony.
N 3002 Mob-87
R. 8376.5 kHz
N 3003 Mob-87 з 18. The frequency 8 376.5 kHz is used exclusively for distress and safety traffic using narrow-band direct-printing telegraphy.
N 3004 Mob-87
S. 8414.5 kHz
N 3005 Mob-87 з 19. The frequency 8414.5 kHz is used exclusively for distress and safety calls using digital selective calling in accordance with No. N 3110 (see Nos. N 3112. N 3206 and N 3229).
N 3006 Mob-87
T. 8416.5 kHz
N 3007 Mob-87 з 20. The frequency 8416.5 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 3008 Mob-87
U. 12290 kHz
N 3009 Mob-87 з 21. The carrier frequency 12 290 kHz is used for distress and safety traffic by radiotelephony.
N 3010 Mob-87
V. 12520 kHz
N 3011 Mob-87 з 22. The frequency 12 520 kHz is used exclusively for distress and safety traffic using narrow-band direct-printing telegraphy.
N 3012 Mob-87
W. 12577 kHz
N 3013 Mob-87 з 23. The frequency 12577 kHz is used exclusively for distress and safety calls using digital selective calling in accordance with No. N 3110 (see Nos. N 3112, N 3206 and N 3229).
N 3014 Mob-87
X. 12579 kHz
N 3015 Mob-87 з 24. The frequency 12 579 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 3016 Mob-87
Y. 16420 kHz
N 3017 Mob-87 з 25. The carrier frequency 16420 kHz is used for distress and safety traffic by radiotelephony.
N 3018 Mob-87
Z. 16695 kHz
N 3019 Mob-87 з 26. The frequency 16695 kHz is used exclusively for distress and safety traffic using narrow-band direct-printing telegraphy.
N 3020 Mob-87
AA. 16804.5 kHz
N 3021 Mob-87 з 27. The frequency 16804.5 kHz is used exclusively for distress and safety calls using digital selective calling in accordance with No. N 3110 (see Nos. N 3112, N 3206 and N 3229).
N 3022 Mob-87
AB. 16806.5 kHz
N 3023 Mob-87 з 28. The frequency 16806.5 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 3024 Mob-87
AC. 19680.5 kHz
N 3025 Mob-87 з 29. The frequency 19680.5 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 3026 Mob-87
AD. 22376 kHz
N 3027 Mob-87 з 30. The frequency 22376 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 3028 Mob-87
AE. 26100.5 kHz
N 3029 Mob-87 з 31. The frequency 26 100.5 kHz is used exclusively for the transmission by coast stations of maritime safety information, by narrow-band direct-printing telegraphy (see Resolution 333 (Mob-87)).
N 3030 Mob-87
AF. 121.5 MHz and 123.1 MHz
N 3031 Mob-87 з 32. (1) The aeronautical emergency frequency 121.5 MHz1 is used for the purposes of distress and urgency for radiotelephony by stations of the aeronautical mobile service using frequencies in the band between 117.975 MHz and 136 MHz (137 MHz after 1 January 1990). This frequency may also be used for these purposes by survival craft stations. Emergency position-indicating radiobeacons use the frequency 121.5 MHz as indicated in Appendix 37 A.
N 3032 Mob-87 (2) The aeronautical auxiliary frequency 123.1 MHz, which is auxiliary to the aeronautical emergency frequency 121.5 MHz, is for use by stations of the aeronautical mobile service and by other mobile and land stations engaged in co-ordinated search and rescue operations (see also No.593).
N 3031.1 Mob-87 1) Normally, aircraft stations transmit distress and urgency messages on the working frequency in use at the time of the distress or urgency incident.
N 3033 Mob-87 (3) Mobile stations of the maritime mobile service may communicate with stations of the aeronautical mobile service on the aeronautical emergency frequency 121.5 MHz for the purposes of distress and urgency only, and on the aeronautical auxiliary frequency 123.1 MHz for co-ordinated search and rescue operations, using class A3E emissions for both frequencies (see also Nos. 501 and 593). They shall then comply with any special arrangements between the governments concerned by which the aeronautical mobile service is regulated.
N 3034 Mob-87
AG. 156.3 MHz
N 3035 Mob-87 з 33. The frequency 156.3 MHz may be used for communication between ship stations and aircraft stations engaged in co-ordinated search and rescue operations. It may also be used by aircraft stations to communicate with ship stations for other safety purposes (see also note g) in Appendix 18)
N 3036 Mob-87
AH. 156.525 MHz
N 3037 Mob-87 з 34. The frequency 156.525 MHz is used in the maritime mobile service for distress and safety calls using digital selective calling (see also Nos. 347, 613A, N 2935, N 2936 and N 2937).
N 3038 Mob-87
AI. 156.650 MHz
N 3039 Mob-87 з 35. The frequency 156.650 MHz is used for ship-to-ship communications relating to the safety of navigation in accordance with note p) in Appendix 18.
N 3040 Mob-87
AJ. 156.8 MHz
N 3041 Mob-87 з 36. (1) The frequency 156.8 MHz is used for distress and safety traffic by radiotelephony (see also No.2994).
N 3042 Mob-87 (2) The frequency 156.8 MHz may be used by aircraft stations for safety purposes only.
N 3043 Mob-87
AK. 406 -406.1 MHz Band
N 3044 Mob-87 з 37. The frequency band 406 -406.1 MHz is used exclusively by satellite emergency position-indicating radiobeacons in the Earth-to-space direction (see No.649).
N 3045 Mob-87
AL. 1530-1544 MHz Band
N 3046 Mob-87 з 38. In addition to its availability for routine non-safety purposes, the band 1530-1544 MHz is used for distress and safety purposes in the space-to- Earth direction in the maritime mobile-satellite service.
N 3047 Mob-87
AM. 1544 -1545 MHz Band
N 3048 Mob-87 з 39. Use of the band 1544-1545 MHz (space-to-Earth) is limited to distress and safety operations (see No.727 A), including:
N 3049 Mob-87 a) feeder links of satellites needed to relay the emissions of satellite emergency position-indicating radiobeacons to earth stations ;
N 3050 Mob-87 b) narrow-band (space-to- Earth) links from space stations to mobile stations.
N 3051 Mob-87
AN. 1626.5 -1645.5 MHz Band
N 3052 Mob-87 з 40. In addition to its availability for routine non-safety purposes, the band 1626.5-1645.5 MHz is used for distress and safety purposes in the Earth-to-space direction in the maritime mobile-satellite service.
N 3053 Mob-87
AO. 1645.5- 1646.5 MHz Band
N 3054 Mob-87 з 41. Use of the band 1645.5-1646.5 MHz (Earth-to-space) is limited to distress and safety operations (see No.7348), including:
N 3055 Mob-87 a) transmissions from satellite EPIRBs ;
N 3056 Mob-87 b) relay of distress alerts received by satellites in low polar earth orbits to geostationary satellites.
N 3057 Mob-87
AP. 9200 -9500 MHz Band
N 3058 Mob-87 з 42. The band 9 200 -9 500 MHz is used by radar transponders to facilitate search and rescue.
N 3059 Mob-87
AQ. Survival Craft Stations
N 3060 Mob-87 з 43. (1) Equipment for radiotelephony use in survival craft stations shall, if capable of operating on any frequency in the bands between 156 MHz and 174 MHz, be able to transmit and receive on 156.8 MHz and at least one other frequency in these bands.
N 3061 Mob-87 (2) Equipment for transmitting locating signals from survival craft stations shall be capable of operating in the 9200 -9 500 MHz band.
N 3062 Mob-87 (3) Equipment with digital selective calling facilities for use in survival craft shall, if capable of operating:
N 3063 Mob-87 a) in the bands between 1605 kHz and 2850 kHz, be able to transmit on 2187.5 kHz;
N 3064 Mob-87 b) in the bands between 4000 kHz and 27500 kHz, be able to transmit on 8414.5 kHz;
N 3065 Mob-87 c) in the bands between 156 MHz and 174 MHz, be able to transmit on 156.525 MHz.
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Mob-87
Section II. Protection of Frequencies for Distress and Safety Communications for the GMDSS
N 3066 Mob-87 A. General
N 3067 Mob-87 з 44. Except as provided for in these Regulations, any emission capable of causing harmful interference to distress, alarm, urgency or safety communications on the frequencies 500 kHz, 2 174.5 kHz, 2 182 kHz, 2187.5 kHz, 4125 kHz, 4177.5 kHz, 4207.5 kHz, 6215 kHz, 6268 kHz, 6312 kHz, 8291 kHz, 8376.5 kHz, 8414.5 kHz, 12290 kHz, 12520 kHz, 12577 kHz, 16420 kHz, 16695 kHz, 16804.5 kHz, 121.5 MHz, 156.525 MHz, 156.8 MHz or the frequency bands 406- 406.1 MHz, 1544 - 1545 MHz and 1645.5 -1646.5 MHz (see also No.3010) is prohibited. Any emission causing harmful interference to distress and safety communications on any of the other discrete frequencies identified in Section I of this Article and in Section I of Article 38 is prohibited.
N 3068 Mob-87 з 45. Test transmissions shall be kept to a minimum on the frequencies identified in Section I of this Article; they should be co-ordinated with a competent authority, as necessary, and, wherever practicable, be carried out on artificial antennas or with reduced power. However, testing on the distress and safety calling frequencies should be avoided, but where this is unavoidable, it should be indicated that these are test transmissions.
N 3069 Mob-87 з 46. Before transmitting for other than distress purposes on any of the frequencies identified in Section I for distress and safety, a station shall, where practicable, listen on the frequency concerned to make sure that no distress transmission is being sent.
N 3070 Mob-87
B. 2173.5 -2190.5 kHz Band
N 3071 Mob-87 з 47. Except for transmissions authorised on the carrier frequency 2182 kHz and on the frequencies 2174.5 kHz, 2177 kHz, 2187.5 kHz and 2189.5 kHz, all transmissions on the frequencies between 2173.5 kHz and 2190.5 kHz are forbidden.
N 3072 Mob-87
C. 156.7625 -156.8375 MHz Band
N 3073 Mob-87 з 48. All emissions in the band 156.7625 -156.8375 MHz capable of causing harmful interference to the authorised transmissions of stations of the maritime mobile service on 156.8 MHz are forbidden.
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Mob-87
Section III. Watch on Frequencies for Distress and Safety Communications for the GMDSS
N 3074 Mob-87
A. Coast Stations
N 3075 Mob-87 з 49. Those coast stations assuming a watch-keeping responsibility in the GMDSS shall maintain an automatic digital selective calling watch on frequencies and for periods of time as indicated in the information published in the List of Coast Stations (see Resolution No.322 (Rev. Mob-87)).
N 3076 Mob-87
B. Coast Earth Stations
N 3077 Mob-87 з 50. Those coast earth stations assuming a watch-keeping responsibility in the GMDSS shall maintain a continuous automatic watch for appropriate distress alerts relayed by space stations (see Resolution No.322 (Rev.Mob-87)).
N 3078 Mob-87
C. Ship Stations
N 3079 Mob-87 з 51. (1) Ship stations complying with the provisions of this Chapter shall, while at sea, maintain an automatic digital selective calling watch on the appropriate distress and safety calling frequencies in the frequency bands in which they are operating. Ship stations, where so equipped, should also maintain watch on the appropriate frequencies for the automatic reception of transmissions of meteorological and navigational warnings and other urgent information to ships. However, ship stations shall also continue to apply the appropriate watch-keeping provisions of Chapter IX (see Resolution 331 (Mob-87)).
N 3080 Mob-87 (2) Ship stations complying with the provisions of this Chapter should, where practicable, maintain a watch on the frequency 156.650 MHz for communications related to the safety of navigation. ,
N 3081 Mob-87
D. Ship Earth Stations
N 3082 Mob-87 з 52. Ship earth stations in use for the reception of shore-to-ship distress alert relays should maintain watch except when communicating on a working channel.
N 3083 to N 3105 NOT allocated.
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Radio Officer й 2002 Edition
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