trắc nghiệm GMDSS vung bien OK

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 Vessels trading in a A3 area fitted with MF/HF DSC must keep continuous watch on VHF Ch.70, 8414.5 kHz plus one other HF distress frequency only 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 VHF Ch.70 and 2187.5 kHz only A GMDSS Sea Area A4 is best described as being an area within 70º - 90º North and 70º - 90º South continuous global coverage of the COSPAS-SARSAT system MF RT range of at least one shore station having continuous MF DSC alerting 70º North - 70º South A GMDSS Sea Area A1 is best described as being an area within MF RT range of at least one shore station providing continuous MF DSC alerting VHF RT range of at least one shore station providing continuous VHF DSC alerting MF RT range of an MF shore station approximately 100 to 150 miles from the coast A GMDSS Sea Area A2 is best described as being within range of the Inmarsat system with continuous watch MF RT range of at least one shore station providing continuous MF DSC alerting HF RT range of at least one shore station providing continuous HF DSC alerting RT range of an MF shore station providing continuous MF watch A GMDSS Sea Area A3 is an area within MF RT range of at least one shore station providing continuous MF DSC alerting 50 to 600 miles from the coast VHF RT range of at least one shore station providing continuous VHF DSC alerting range of the Inmarsat system A Ships sailing exclusively in GMDSS Sea Areas A2 must maintain continuous DSC watch on 8414.5 kHz and Ch.70 VHF 2182 kHz and Ch.70 VHF 2187.5 kHz and Ch.70 VHF 2174.5 kHz and Ch.70 VHF A