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Maritime

Radio Services

Operation

Channels 24, 25, 26, 27, 28, 84, 85, 86, 87: Marine Operator -

Can be used by any vessel to place a telephone call to any place in the

world or to a vessel outside their transmitting range. Used between

vessels and public coast stations. You must contact a marine operator

on the channel assigned to your navigating area.

Channels WX1, through WX10: Weather - Used by any vessel to

receive continuous weather information from the National Oceanic

and Atmospheric Administration (NOAA). This is a one-way broad-

cast to any interested parties. You are not allowed to transmit on these

frequencies. A list of weather broadcast stations for the U.S. is

contained in the "Maritime Radio Users Handbook". They provide

continuous around-the-clock broadcasts of the latest weather informa-

tion directly from the national Weather Service Offices. These

channels are designated on Marine VHF equipment as WX1 through

WX10, but are rarely used beyond WX7.

During severe weather, National Weather Service forecasters can

interrupt routine weather broadcasts and substitute special warning

messages. Specially designed warning receivers either sound an alarm

indicating an emergency exits or tune into the weather frequency. The

VHF 725 is equipped to sound the alarm tone and tune into the

broadcast when the Weather Alert feature is activated.

Some channels will appear on the display with an "A" suffix. Hese

are "Simplex Channels" receiving and transmitting on the same

frequency. See "Selecting a Channel" on page 16 for a more detailed

explanation. There are other regular channels in the list of channels

on pages 28 and 29 that are not defined above. They have special uses

that do not apply generally to regular maritime traffic and communi-

cations.