In addition to the three operation modes, your radio provides four different watch modes which you can activate during any operation mode. In the watch modes, the radio briefly checks for activity on a specific channel, then returns to its previous operation.

Watch mode

What it does

To turn it on/off

Weather Alert

Checks the last-used weather channel for

Select Weather Alelrt On or Off from the

Watch

hazard alerts every few seconds.

Setup menu.

Dual Watch

Checks emergency channel 16 for activity

Select Dual or Triple Watch at Setup

menu, and press and hold 16/9-Trifor

every few seconds.

 

2 seconds.

 

 

Triple Watch

Checks emergency channels 16 and 9 for

Select Dual or Triple Watch at Setup

menu, and press and hold 16/9-Trifor

activity every few seconds.

 

2 seconds.

 

 

DSC Watch

Checks the DSC channel every 2 seconds

Turn DSC Watch on or off from the Setup/

for messages from other ships.

DSC Watch menu.

 

## Note: Private boats must monitor channel 16 whenever they are underway. Water-going vessels should have either Triple Watch or Dual Watch on at all times.

Normal

xx To transmit, remove the radio from the charger, then press and hold Push to Talk. Release the button when you are finished talking.

xx For the best sound quality, hold the microphone about two inches from your mouth while you’re talking.

xx Press Channel Up to move up one channel at a time. Press and hold the button to scroll quickly up the channels.

xx Press Channel Down to move down one channel at a time. Press and hold the button to scroll quickly down the channels.

xx To change the transmit power, press and hold ENTER-H/M/L. The transmit power cycles through LOW (1 W), MID (2.5 W), and 6 W, then back to LOW again. Press BOOST on the left side of the radio to boost the transmit power to 6 W (Lithium Ion battery) or to 2.5 W (alkaline batteries).

## If you are using alkaline batteries, 6 W is not available.

Normal mode with Weather Alert Watch

 

 

 

 

 

 

 

If you activate Weather Alert Watch while

 

Monitoring Channel 25

 

 

 

 

 

 

 

 

 

 

operating in normal mode, the radio checks the

 

 

Every few seconds, the

 

 

 

most recently used weather channel every few

 

radio checks the last-used

 

 

 

seconds. If it detects a weather or other hazard

 

weather channel.

 

 

 

alert, it will switch to that weather channel. (If you are actively

WX Alert

 

 

 

 

wx

 

transmitting, the radio waits until you finish your transmission

Watch on

 

 

 

 

before checking the weather channel.)

Normal mode with Triple Watch or Dual Watch

If you activate Triple Watch while operating in normal mode, the radio checks channels 16 and 9 every few seconds; with Dual Watch turned on, the radio only checks channel 16. The radio will not check channels 16 or 9 while you are actively transmitting; it waits

Uniden MHS135DSC Radio Owner’s Manual

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Uniden MHS135DSC owner manual Normal, Watch mode What it does To turn it on/off, Monitoring Channel

MHS135DSC specifications

The Uniden MHS135DSC is a highly regarded handheld marine radio designed for boating enthusiasts and professionals alike. This device combines advanced technology with user-friendly features, making it an essential tool for effective communication on the water.

One of the standout features of the MHS135DSC is its Digital Selective Calling (DSC) capability, which enhances safety by allowing boaters to send automated distress signals. This feature significantly improves the speed of communication in emergencies, sending distress alerts that include the boat's GPS location to nearby vessels and coast guard stations. The MHS135DSC also supports Class D DSC, which means it can prioritize emergency calls over regular communication.

The radio is built to withstand the rigors of marine environments, featuring an IPX8 waterproof rating, making it submersible in water up to 1.5 meters for 30 minutes. This robust design ensures that the radio remains operational even in adverse weather conditions, providing peace of mind to users.

Another notable characteristic of the MHS135DSC is its built-in GPS receiver. This feature allows users to easily access their location and navigate more effectively. The unit can display real-time coordinates, and it integrates seamlessly with other marine navigation systems. The internal GPS also facilitates DSC operations, ensuring that crucial location data is sent during distress calls.

The MHS135DSC operates on both the VHF marine radio band and supports a wide range of channels for effective communication. With 1W/5W power settings, users can adjust transmission strength according to their communication needs, whether they are in close proximity to other vessels or need to reach distant stations.

A user-friendly interface is an additional asset of this radio. The clearly labeled buttons and intuitive design make it easy to operate, even for those new to marine electronics. The radio also features a bright LCD display for clear visibility even under direct sunlight.

Battery life is another critical aspect, and the MHS135DSC excels in this area with a rechargeable lithium-ion battery that provides long-lasting power. The device also supports battery save modes, ensuring that the radio remains functional during extended outings.

In summary, the Uniden MHS135DSC is a feature-rich handheld marine radio that prioritizes safety, usability, and durability. With its DSC capabilities, waterproof design, built-in GPS, and robust battery life, it serves as an essential communication tool for anyone navigating the waters, ensuring connectivity and peace of mind.