In small-angle stability，when external forces exist，the buoy

A vessel is inclined at an angle of loll. In the absence of external forces，the righting arm (GZ) is ______.

A.positive

B.negative

C.zero

D.vertical

How would you pass a red buoy in the maritime buoyage system “A”?______.

A.keep the buoy on the vessel’s starboard side when approaching a port and on the vessel’s port side when leaving

B.keep the buoy on the vessel’s port side when approaching a port and on the vessel’s starboard side when leaving

C.keep the buoy on the vessel’s starboard side when approaching and leaving

D.keep the buoy on the vessel’s port side when approaching and leaving

When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?

A.Light List

B.Notice to Mariners

C.On the chart

D.Coast Pilot

You are sailing south on the Intracoastal Waterway（ICW）when you sight a green can buoy with a yellow square painted on it．Which of the following is TRUE ________．

A.You should pass the buoy close aboard on either side

B.The buoy marks the end of the ICW in that area

C.You should leave the buoy to port

D.The yellow square is retroreflective material used to assist in sighting the buoy at night

In small angle stability, when external forces exist, the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the ______.

A.center of gravity

B.center of flotation

C.metacenter

D.metacentric height

Under the IALA-A Buoyage System，a green spar buoy with a triangular topmark would indicate that the buoy ______.

A.should be left to port when heading out to sea

B.may be left close aboard on either side

C.is on the north side of a point of interest

D.is marking the preferred channel