19C6 C
 Which is true concerning a required watch on VHF Ch-16?
A. When a vessel is in an A1 sea area and subject to the Bridge-to-Bridge act and in a VTS system, a watch is required on Ch-16 in addition to both Ch-13 and the VTS channel.
B. It is not compulsory at all times while at sea until further notice, unless the vessel is in a VTS system.
C. When a vessel is in an A1 sea area and subject to the Bridge-to-Bridge act and in a VTS system, a watch is not required on Ch-16 provided the vessel monitors both Ch-13 and the VTS channel.
D. It is not always compulsory in sea areas A2, A3 and A4.
