Noaa weather channels and alert, World city time zones – Cobra Electronics MRF45 User Manual
Page 15
Nothing Comes Close to a Cobra
®
NOAA Weather Channels
And Alert
25
NOAA Weather Channels And Alert
•
Monitoring the weather will probably be a frequent use of your radio. The National
Oceanic and Atmospheric Administration (NOAA) provides continuous, around-the-
clock broadcasts of the latest weather information. Taped weather messages run
every four (4) to six (6) minutes and are revised every two (2) or three (3) hours,
or as needed. The Coast Guard also announces weather and other safety warnings
on Channel 16 and DSC Channel 70. Smart boaters keep an eye on safety and an
ear to the radio — and never let the weather catch them unaware.
NOAA Emergency Weather Alert
In the event of a major storm or other weather condition requiring vessels at sea
or on other bodies of water to be notified, NOAA broadcasts a 1050 Hz tone that
receivers such as your CobraMarine VHF radio can detect and warn you of a weather
alert condition. When the Weather Alert mode on your radio is On, this signal will
produce the weather alert alarm tone from the speaker and a “weather alert”
message on the LCD to signal that a weather alert is being broadcast.
The radio will automatically switch to Weather Radio mode.
Test
To test this system, NOAA broadcasts the 1050 Hz signal every Wednesday sometime
between 11 a.m. and 1 p.m. in each local time zone. Any receiver that can detect the
weather alert tone may use this feature to verify that this feature is functioning properly.
Weather Frequency/Channel
Channel
RX Frequency MHz
Weather Channel
1
162.550
NOAA
2
162.400
NOAA
3
162.475
NOAA
4
162.425
NOAA
5
162.450
NOAA
6
162.500
NOAA
7
162.525
NOAA
8
161.650
Canadian
9
161.775
Canadian
10
163.275
NOAA*
*This frequency is no longer in use.
VHF Marine Radio Protocols
24 English
World City Time Zones
World City Time Zones
•
Longitudinal Zone
Offset
City
E172.50 to W172.50
-12
IDLW (International Date Line West)
W172.50 to W157.50
-11
Nome
W157.50 to W142.50
-10
Honolulu
W142.50 to W127.50
-9
Yukon STD
W127.50 to W112.50
-8
Los Angeles
W112.50 to W097.50
-7
Denver
W097.50 to W082.50
-6
Chicago
W082.50 to W067.50
-5
New York
W067.50 to W052.50
-4
Caracas
W052.50 to W037.50
-3
Rio de Janeiro
W037.50 to W022.50
-2
Fernando de Noronha
W022.50 to W007.50
-1
Azores Islands
W007.50 to E007.50 GMT
+0
London
E007.50 to E022.50
+1
Rome
E022.50 to E037.50
+2
Cairo
E037.50 to E052.50
+3
Moscow
E052.50 to E067.50
+4
Abu Dhabi
E067.50 to E082.50
+5
Maldives
E082.50 to E097.50
+6
Dhuburi
E097.50 to E112.50
+7
Bangkok
E112.50 to E127.50
+8
Hong Kong
E127.50 to E142.50
+9
Tokyo
E142.50 to E157.50
+10
Sydney
E157.50 to E172.50
+11
Solomon Islands
E172.50 to W172.50
+12
Auckland
VHF Marine Radio Protocols