VHF Marine Radio Protocols
For Example
Emergency Messages and Distress Procedure
Specifications | Specifications |
Specifications | • |
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“Mayday — Mayday — Mayday”
“This is Corsair — Corsair — Corsair” [repeated three (3) times] “Mayday Corsair”
“Point Lynas bears 220 degrees magnetic — distance 5 kilometers” “Struck submerged object and flooding — need pump and tow” “Four (4) adults, three (3) children aboard — no one injured” “Estimate we will remain afloat
“Corsair is 8 metre sloop with blue hull and tan deck house” “I will be listening on Channel 16”
“This is Corsair” “Over”
General |
Number of Channels | All U.S., Canadian, International and |
| NOAA Weather Channels |
Channel Spacing | 25 kHz |
Modulation | 5 kHz Max. |
Input Voltage | 7.4 VDC |
Battery Life: | LiON: 8 hours @ 6 watts, |
5% TX, 5% RX, 90% Standby | 16 hours @ 1 watt |
| Alkaline: 18 hours @ 6 watts, |
| 35 hours @ 1 watt |
Current Drain: | 40 mA |
Standby | |
Receive (Rx) | 200 mA |
Transmit (Tx) | 1.8 A @ High Power, 700 mA @ Low Power |
Temperature Range | |
Radio Dimensions | 4.8" x 2.4" x 1.4" |
| (123 mm x 62 mm x 36 mm) not |
| including antenna |
Radio Weight | 0 lbs 8 oz. (228 g) without batteries |
Receiver |
|
Frequency Range | 156.050 to 163.275 MHz |
Receiver Type | Double Conversion |
Sensitivity: | 0.35 uV |
20 dB Quieting | |
12 dB Sinad | 0.30 uV |
Adjacent Channel Selectivity | |
Intermodulation and Rejection | |
Spurious and Image Rejection | |
AF Output | 250 mW @ 8 Ohms |
Transmitter |
|
Frequency Range (Tx): | 156.025 to 157.425 MHz |
RF Output Power | 1, 3 or 6 watts (5 maximum in Australia) |
Spurious Emissions | |
| Power |
Microphone Type | Condenser |
Frequency Stability | |
FM Hum and Noise | 40 dB |
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36 English | Nothing Comes Close to a Cobra® 37 | ||