A.Three short blasts
B.A long blast
C.A prolonged blast
D.No signal is required

A.alternating red and yellow light
B.alternating white and yellow light
C.all-round white or yellow light
D.all-round white light only

A.The fishing vessel must keep clear of the vessel not under command
B.If the vessel not under command is a power-driven vessel，she must keep clear of the fishing vessel
C.They must exchange whistle signals
D.Both vessels are required to take action to stay clear of each other

A.An emergency boat and crew
B.A siren or rotating flashing light
C.Flashing red lights located one-half mile upstream and downstream of the facility
D.Buoys with flashing lights controlled from shore，located one-half mile upstream anddownstream of the facility

A.a single white light forward
B.two masthead lights in a vertical line
C.two towing lights in a vertical line
D.two all-round red lights where they can best be seen

A.is between the scheme and the nearest land
B.contains all the traffic moving in one direction
C.is designated as an anchorage area
D.separates traffic proceeding in one direction from traffic proceeding in the opposite direction

A.only anchor in the separation zone
B.cross a traffic lane at as small an angle as possible
C.avoid anchoring in areas near the termination of the scheme
D.utilize the separation zone for navigating through the scheme if she is impeding other traffic due to her slower speed

A.only in case of an emergency or to engage in fishing within the zone
B.as nearly as practical at right angles to the general direction of traffic flow
C.at as small an angle as possible
D.only to anchor within the zone

A.merchant vessel reporting systems
B.traffic separation schemes
C.collision avoidance fairways
D.restricted maneuverability channels

A.subjecting
B.subject
C.subjected
D.subject to