At least()two-way VHF radiotelephone apparatus shall be provided on every cargo ship of 300 tons gross tonnage and upwards but less than 500 tons gross tonnage.
A、one
B、two
C、three
D、four
A、one
B、two
C、three
D、four
A、A.be turned by a turning gear for at least one minute B、B.be turned by a turning gear for at least two minutes C、C.be turned at least one complete turn D、D.be turned at least two complete turns
A、At least two years after the last entry B、At least one year after the last entry C、At least 90 days after the last entry D、At least 30 days after the last entry
A、At least two years after the last entry B、At least one year after the last entry C、At least 90 days after the last entry D、At least 30 days after the last entry
A、You can reach other Level 2 routers. B、It can reach at least one other defined area. C、The router is reachable by at least two ES-IS nodes. D、It has at least one enabled reachable prefix with a valid metric defined.
A、carry at least two injured persons B、float for at least two hours C、be used on the types of helicopters serving the unit D、All of the above