（）is the system for the broadcast and automatic reception of maritime safety information by means of narrow-band direct-printing telegraphy.

A.conduction fog
B.radiation fog
C.frontal fog
D.advection fog

A.active weather disturbances such as hurricanes or tropical storms
B.the latest navigational warnings
C.scheduled vessel arrivals and departures for a 24-hour period
D.water levels at river ports where run-off affects tidal heights

A.Overhead power lines
B.Louisiana-Mississippi ferry crossings
C.Two railroad trestles
D.Two submerged oil pipelines