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
Trang 1Cau hoi Vessels trading in a A3 area fitted with MF/HF DSC must keep continuous watch on
A VHF Ch.70, 8414.5 kHz plus one other HF distress frequency only
B VHF Ch.70, 2187.5 kHz and 2174.5 kHz
C VHF Ch.70, 2187.5 kHz, 8414.5 kHz plus one other HF distress frequency
D VHF Ch.70 and 2187.5 kHz only
Cau hoi GMDSS Sea Area A4 is best described as being an area within
A 70º - 90º North and 70º - 90º South
B continuous global coverage of the COSPAS-SARSAT system
C MF RT range of at least one shore station having continuous MF DSC alerting
D 70º North - 70º South
Cau hoi GMDSS Sea Area A1 is best described as being an area within
A MF RT range of at least one shore station providing continuous MF DSC alerting
B VHF RT range of at least one shore station providing continuous VHF DSC alerting
C MF RT range of an MF shore station
D approximately 100 to 150 miles from the coast
Cau hoi GMDSS Sea Area A2 is best described as being within
A range of the Inmarsat system with continuous watch
B MF RT range of at least one shore station providing continuous MF DSC alerting
C HF RT range of at least one shore station providing continuous HF DSC alerting
D RT range of an MF shore station providing continuous MF watch
Cau hoi GMDSS Sea Area A3 is an area within
A MF RT range of at least one shore station providing continuous MF DSC alerting
B 50 to 600 miles from the coast
C VHF RT range of at least one shore station providing continuous VHF DSC alerting
D range of the Inmarsat system
Cau hoi Ships sailing exclusively in GMDSS Sea Areas A2 must maintain continuous DSC
watch on
A 8414.5 kHz and Ch.70 VHF
C 2187.5 kHz and Ch.70 VHF
D 2174.5 kHz and Ch.70 VHF