ITU-R M 688-1990 TECHNICAL CHARACTERISTICS FOR A HIGH FREQUENCY DIRECT-PRINTING TELEGRAPH SYSTEM FOR PROMULGATION OF HIGH SEAS AND NAVTEX-TYPE MARITIME SAFETY INFORMATION《用于发布外海和NA.pdf

《ITU-R M 688-1990 TECHNICAL CHARACTERISTICS FOR A HIGH FREQUENCY DIRECT-PRINTING TELEGRAPH SYSTEM FOR PROMULGATION OF HIGH SEAS AND NAVTEX-TYPE MARITIME SAFETY INFORMATION《用于发布外海和NA.pdf》由会员分享，可在线阅读，更多相关《ITU-R M 688-1990 TECHNICAL CHARACTERISTICS FOR A HIGH FREQUENCY DIRECT-PRINTING TELEGRAPH SYSTEM FOR PROMULGATION OF HIGH SEAS AND NAVTEX-TYPE MARITIME SAFETY INFORMATION《用于发布外海和NA.pdf（1页珍藏版）》请在麦多课文档分享上搜索。

1、_- 122 CCIR VOLUME*VIII 90 E 4855232 0533394 8 = Rec. 688 RECOMMENDATION 688 * TECHNICAL CHARACTERISTICS FOR A HIGH FREQUENCY DIRECT-PRINTING TELEGRAPH SYSTEM FOR PROMULGATION OF HIGH SEAS AND NAVTEX-TYPE MARITIME SAFETY INFORMATION (Question 5/8) (1 990) The CCIR, CONSIDERING (a) the 1988 amendment

2、s to the International Convention for the Safety of Life at Sea, 1974, which permits ships, engaged exclusively on voyages in areas where an HF direct-printing telegraphy maritime safety information service is provided and which are fitted with equipment capable of receiving such service, to be exem

3、pted from the requirement to carry a radio facility For the reception of maritime safety information by the INMARSAT enhanced group calling systems; (6) that the World Administrative Radio Conference for Mobile Services, Geneva, 1987, allocated an exclusive narrow-band direct-printing channel on the

4、 frequencies 4210 kHz, 6314 kHz, 8416.5 kHz, 12 579 kHz, 16 806.5 kHz, 19 680.5 kHz, 22 376 kHz and 26 100.5 kHz, which could meet this requirement; (c) that the World Administrative Radio Conference for Mobile Services, Geneva, 1987, also allocated an exclusive narrow-band direct-printing channel o

5、n the frequency 4209.5 kHz for NAVTEX-type transmissions; , (d) Recommendation 540 - Operational and technical characteristics for an automated direct-printing telegraph system for promulgation of navigational and meteorological warnings and urgent information to ships, i.e. the international NAVTEX

6、 system, operating on 518 kHz, UNANIMOUSLY RECOMMENDS that both the technical characteristics for transmitting high seas maritime safety information using HF NBDP on the frequencies of CONSIDERING (b), and the technical characteristics for transmitting NAVTEX- type navigational and meteorological wa

7、rnings and urgent information to ships using 4209.5 kHz should be in accordance with Annex II of Recommendation540. * The Director of CCIR is requested to bring this Recommendation to the attention of the International Maritime Organization (IMO). I - COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling Services