In more recent years,()has been used by civilians in many new ways to determine positions,such as in automobile and boat navigation,hiking,emergency rescue,and precision agriculture and mining.
A、A.GPS
B、B.GMDSS
C、C.AIS
D、D.Navtex
A、A.GPS
B、B.GMDSS
C、C.AIS
D、D.Navtex
A、kept on board no more than 2 years B、inspected and serviced every 6 months C、destroyed if more than 5 years old D、maintained in good and serviceable condition
A、I have not done this yet. B、Less than 6 months C、More than 6 months but less than 1 year D、1-2 years E、2-3 years F、More than 3 years
A、I have not done this yet. B、Less than 6 months C、More than 6 months but less than 1 year D、1-2 years E、2-3 years F、More than 3 years
A、I have not done this yet. B、Less than 6 months C、More than 6 months but less than 1 year D、1 - 2 years E、2 - 3 years F、More than 3 years
A、I have not done this yet. B、Less than 6 months C、More than 6 months but less than 1 year D、1 - 2 years E、2 - 3 years F、More than 3 years
A、I have not done this yet. B、Less than 6 months C、More than 6 months but less than 1 year D、1-2 years E、2-3 years F、More than 3 years
A、I have not done this yet. B、Less than 6 months C、More than 6 months but less than 1 year D、1-2 years E、2-3 years F、More than 3 years