What is the transmitting range of most NAVTEX stations?

What is the transmitting range of most NAVTEX stations?

• A. Typically 50-100 nautical miles
• B. 500-600 nautical miles
• C. 1000-2000 nautical miles
• D. 200-400 nautical miles

Answer: (D)

NAVTEX broadcasts are designed to deliver Maritime Safety Information to ships within a coastal area, using a low-frequency signal that travels as a groundwave over the sea. With typical transmitter power and antenna height, the practical distance over which NAVTEX messages can be reliably received is about 200 to 400 nautical miles from the transmitter. That range best matches how NAVTEX is intended to cover shipping routes along coasts, making the 200–400 nautical miles choice the correct one. The other ranges would be too short or too long for standard NAVTEX coastal coverage.

NAVTEX broadcasts are designed to deliver Maritime Safety Information to ships within a coastal area, using a low-frequency signal that travels as a groundwave over the sea. With typical transmitter power and antenna height, the practical distance over which NAVTEX messages can be reliably received is about 200 to 400 nautical miles from the transmitter. That range best matches how NAVTEX is intended to cover shipping routes along coasts, making the 200–400 nautical miles choice the correct one. The other ranges would be too short or too long for standard NAVTEX coastal coverage.