【单选题】The abbreviation WWNWS means ____.
A.
World Wide Number Watch Station
B.
World Wide Network Watch Service
C.
World Wide Network Warning Station
D.
World Wide Navigational Warming Service
【单选题】In WWNWS, local wamings are normally broadcast on
【单选题】The abbreviation WWNWS means_____.
A.
World Wide Network Warning Station
B.
World Wide Navigational Warning Service
C.
World Wide Number Watch Station
D.
World Wide Network Watch Service
【单选题】The WWNWS establishes three types of navigational warning:().
A.
Distress, Urgency and Safety
B.
Vital, Important and Routine
C.
NAVAREA, Coastal and local
【单选题】The abbreviation WWNWS means_______.
A.
World Wide Network Warning Station
B.
World Wide Navigational Warning Service
C.
World Wide Number Warning Station
D.
World Wide Network Watch Service
【单选题】The WWNWS is a coordinated global service for the broadcast by radio of vital information on() to marine navigation