trắc nghiệm GMDSS DSC

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 The correct channel for making Routine DSC Alerts in the VHF band is

Cau hoi A coast station making a DSC international Routine shore-to-ship alert transmits on

Cau hoi The use of VHF Ch.70 is for

A narrow band direct printing (NBDP)

C calling by telephony

D Digital Selective Calling (DSC)

Cau hoi A VHF DSC All Ships Safety Alert should be transmitted on

Cau hoi Routine DSC alerts are permitted on VHF Ch.70

B restricted to between 0900 and 1700 UTC

D restricted to between 1200 and 0900 UTC

Cau hoi An MF DSC All Ships Safety Alert should be transmitted on

Cau hoi Routine DSC ship-to-ship alerts are permitted on

Cau hoi To make a national ship-to-shore DSC Alert, your first choice of MF frequencies should

be

A ship transmits on 2187.5 kHz, and receives on 2187.5 kHz

B ship transmits on 2177 kHz, and receives on 2177 kHz

C ship transmits on 2189.5 kHz, and receives on 2177 kHz

D national paired call and reply DSC frequencies

Cau hoi An All Ships MF DSC Urgency Alert should be transmitted on

Cau hoi An All Ships MF DSC Safety Alert should be transmitted on

Cau hoi Routine DSC Alerts between ships are permitted on

Cau hoi When making a Routine DSC ship-to-ship alert on Ch.70 VHF, the VHF RT working

channel you would select could be

Cau hoi Routine DSC Alerts can be made on 2187.5 kHz

A between 1700 and 0900 UTC

C between 0900 and 1700 UTC

Cau hoi VHF Ch.70 can be used to make DSC

A Distress, Urgency, Safety and Routine Alerts

B Distress and Safety Alerts only

C Distress Alerts only

D Urgency and Safety Alerts only

Cau hoi A ship makes a Routine manual DSC ship-to-shore alert but receives no response

Further alerts may be made

A after 5 minutes, with the next alert 15 minutes later

B at 5 minute intervals

C after 2 minutes with the next alert 3 minutes later

D at 2 minutes intervals

Dap an A

Cau hoi To make an international DSC Routine ship-to-shore alert,the ship transmits on