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Tổng quan hệ thống GMDSS phục vụ TKCN. Năm 1979,Tổ chức Hàng Hải quốc tế (International Maritime Organization IMO) đã tổ chức hội nghị về vấn đề tìm kiếm và cứu nạn trên biển. ... Hệ thống mới được tự động hóa và sử dụng sóng vô tuyến trái đất và vệ tinh cho báo động cấp cứu và các thông tin theo sa
Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B The main purpose of transmissions on 518 kHz is for NAVTEX English-language reception EPIRB local homing triggering a SART during SAR operations Two-way RT communication with liferaft during SAR operations A The designated frequency/channel for ship-ship RT Safety of Navigation exchanges is VHF Ch.13 2182 kHz VHF Ch.06 518 kHz A The preferred frequency/channel to cancel a false DSC Distress Alert sent on Ch.70 is 518 kHz VHF Ch.16 GHz 2182 kHz A The preferred frequency/channel to cancel a false DSC Distress Alert sent on 12577 kHz is 12 MHz RT (voice) Distress frequency 2182 kHz 518 kHz VHF Ch.16 A A SART may be triggered when receiving a signal from MF DSC 3cm/X-band radar COSPAS-SARSAT EPIRB 10cm/S-band radar A The preferred frequency to transmit a distress message using telex on MF is 2177 kHz 2189.5 kHz 2174.5 kHz 8414.5 kHz A The main purpose of RT transmissions on VHF Ch.13 is for Cancelling a false DSC Distress Alert sent on Ch.70 ship-to-ship Safety of Navigation communications ship-to-ship Routine communications SAR aircraft communications to home onto an EPIRB A Vessels trading in area A3 fitted with MF/HF DSC must keep continuous watch on VHF Ch.70, 2187.5 kHz and 2174.5 kHz VHF Ch.70, 2187.5 kHz, 8414.5 kHz plus one other HF distress frequency C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an Cau hoi A B C D Dap an VHF Ch.70, 8414.5 kHz plus one other HF distress frequency only VHF Ch.70 and 2187.5 kHz only A The main purpose of transmissions on 2174.5 kHz is for ship to ship RT communications for the Safety of Navigation Routine ship to ship telex messages on HF MF telex Distress, Urgency and Safety messages NAVTEX English-language broadcasts A The main purpose of RT (voice) transmissions on 2182 kHz is for cancelling false alerts sent on Ch.70 communications concerning Distress, Urgency and Safety communications between ships for Routine messages communications between ships for the Safety of Navigation A The preferred frequency/channel for two-way communication with survival craft during SAR operations is GHz 2182 kHz VHF Ch.16 406 MHz A The main purpose of transmissions on 406 MHz is for Two-way RT communication with liferaft during SAR operations EPIRB satellite position fixing MF telex Distress, Urgency and Safety messages NAVTEX English-language broadcasts A ... the Safety of Navigation A The preferred frequency/channel for two-way communication with survival craft during SAR operations is GHz 2182 kHz VHF Ch.16 406 MHz A The main purpose of transmissions