This document is the owner's manual for the Uniden Marine 2-Way VHF Radio MHS550, providing instructions and guidelines on making distress calls using the radio in emergency situations.
The Uniden MHS550 is a submersible marine 2-way VHF radio designed for use in US, Canadian, and international waters. Key features include Triple Watch or Dual Watch operation to monitor Coast Guard channels 16 and 9, NOAA weather alert watch, and support for FRS band with privacy codes. The device also allows reception of AM/FM broadcast bands and aircraft frequencies (108-137 MHz).
| Frequency Range (Marine-Weather) | 156.05 ~ 163.275 MHz, 25 kHz Step |
|---|---|
| Frequency Range (FRS) | 462.5625 ~ 467.7125 MHz, 12.5 kHz Step |
| Frequency Range (Aircraft) | 108.00 ~ 137.00 MHz |
| Transmit Power Levels | 5W, 2.5W, 1W (MRN) |
| Waterproof Grade | JIS8/IPX8 |
| Battery Life (Li-Ion) | 10 Hours, Min. |
Triple Watch checks Coast Guard Distress/Hailing channels 16 and 9 in the background while you are on other channels.
Yes, it allows monitoring of aircraft-to-ground transmissions on frequencies from 108-137 MHz.