MR HH450 DUAL - All-Terrain-Radio
All-terrain VHF radio
Customers who bought the MR HH450 DUAL - All-Terrain-Radio are saying:
One hundred million alerts shared and received each year from our community of Cobra drivers on the iRadar app.
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Official VHF Radio of
Nothing Comes Close to a Cobra
When heading out on the water, a VHF radio is vital for communication and safety. With advanced safety features, easy menu navigation, and 24 hr access to emergency alerts and broadcasts, Cobra’s got you covered.
Designed for use on boats, ATVs, snowmobiles, road trips, and anywhere else adventure takes you.
Weather Alert with S.A.M.E
Stay alert and informed with weather and emergency alerts only when a threat is nearby.
Automatically records the last 20 seconds of VHF calls so you can always play back what you missed.
The HH450 is designed to float so you never lose your VHF radio if dropped overboard.
The orange core design makes it easy to spot and retrieve your floating radio if dropped.
The matte black case is designed for extreme durability.
Use anywhere, any time, on any vehicle
Weather Alerts w/ S.A.M.E
Get alerted to weather when a threat is nearby
Replay the last 20 second of missed VHF calls
Low, medium, and high power for various range of communication.
Orange core, floating design means you’ll never lose your radio
Built for extreme durability
Item # MR HH450 DUAL
Weight9.59 oz. (272 g.)Height4.8 in. (123mm) - not including antennaWidth2.40 in. (62mm)Depth1.4 in. (36mm)
All-Terrain-Radio™ - Use on boats, ATVs, snowmobiles, roadtrips, and many other uses
Rewind-Say-Again® - Replay missed VHF calls
Floating - Never lose your radio. The floating design and orange core make retrieval easy if dropped overboard
Weather Alert with S.A.M.E – Weather and emergency alerts only if threat is nearby
6 Watt VHF and High Power GMRS - Select between Low, Medium and High power for short and long range communication
What is the range of my Cobra marine radio?
It is difficult to provide a number, because range will be affected by the following factors:
Transmit power: Higher transmit power gets better range. Transmit powers up to 25 watts are allowed.
Length of the antenna: Short antennas will get shorter range. Long antennas will get longer range.
Height of the antenna: The higher the antenna is mounted, the better the range.
Antenna tuning: Having a properly tuned antenna will maximize your range. Checking the SWR of the antenna will identify how well your antenna is tuned to the marine band.
Atmospheric conditions: Atmospheric conditions can affect radio propagation. If conditions are just right, there are times when you can transmit 100 miles or more. On other occasions you may be limited to only 10 miles. Although these extremes occur infrequently, it does serve to illustrate the effects of atmospheric conditions.
Your location: Your location will also influence the range. For example if you are located on an inland waterway where buildings and trees can block your signal, you will get less range than if you where in the middle of the ocean. With a handheld radio your range will vary depending on whether you are inside the cabin (worst range) or standing on the highest portion of the deck (best range).
Battery condition (handheld models): Low batteries will cause your transmit power to drop, which will reduce your range.
The combination and severity of the above factors will determine your range. Several of these factors can change on a day-to-day basis.
If we were to eliminate all the negative effects, a properly setup mobile radio transmitting 25 watts will communicate as follows:
-A powerboat communicating to another powerboat: approximately 20 miles.
-A powerboat communicating to a well-equipped shore station: approximately 50 miles.
-On a sailboat with the antenna mounted at the top of the mast, communicating to another sailboat: approximately 40 miles.
-On a sailboat with the antenna mounted at the top of the mast, communicating to a well-equipped shore station: approximately 80 miles.
Handheld radios will communicate as follows:
-A 5 watt handheld will communicate approximately 7 miles to another handheld, or approximately 20 miles to a well-equipped shore station
-A 2 watt handheld will communicate approximately 5 miles to another handheld, or approximately 15 miles to a well-equipped shore station
What is DSC (Digital Selective Calling)?
Digital Selective Calling (DSC) is a radio technology allowing enhanced distress radio messages to be sent digitally. In addition, a DSC equipped vessel with an MMSI number can make a "private" hailing call to another DSC-equipped vessel. Only the vessel being called will receive the initial contact, but the subsequent conversations will take place on an open, “working” channel, which can be monitored by any VHF equipped vessel within your broadcast range.
What is a Maritime Mobile Service Identity (MMSI)?
Maritime Mobile Service Identity (MMSI) is a unique 9 digit number that is assigned to a (Digital Selective Calling) DSC radio or an AIS unit. Similar to a cell phone number, your MMSI number is your unique calling number for DSC radios or an AIS unit. The information provided when obtaining a MMSI number is transferred into the U.S. Coast Guard's national distress database for use in emergency situations.
Is there a fee to obtain an MMSI?
MMSI numbers are free for BoatUS members or $25 for non-members. To obtain a new or change your existing MMSI#, visit: https://www.boatus.com/MMSI/MMSI/ObtainMMSI#!
Why should I register my VHF radio and obtain an MMSI number?
Your VHF radio is the single most important piece of safety equipment you can have on board your vessel. By using a VHF radio with Digital Select Calling (DSC) capability, you increase your safety dramatically by taking advantage of enhanced communications options. These options link you to other vessels and rescue facilities, providing a strong, modern safety net not offered by mobile phones while in the water.
Why is it so important to have a DSC radio with built-in GPS and/or the option to connect to an external GPS?
Having a built-in GPS in a emergency, one push of the Distress button, transmits the distress signal containing your MMSI# and location Lat/Lon information to USCG and all other DSC capable receivers within your broadcast range. Should (you) the operator become incapacitated, the radio will continue to send the mayday signal.
If your DSC radio does not have a built-in GPS, the Coast Guard urges, in the strongest terms possible, that you take the time to interconnect your DSC-equipped radio to an external GPS. Doing so may save your life in a distress situation! Here is a link to an external GPS available from Cobra https://www.cobra.com/collections/marine-accessories/products/cm300005cobrapositioningsystem
Why join Sea Tow?
As the official VHF radio of Sea Tow, we recommend it. It is the #1 choice of boaters nationwide for boat towing and expert on-water assistance. Membership offers discounts on fuel, boating supplies, restaurants, and gives you an experienced captain standing by 24/7 in case you need help while out on the water. Joining Sea Tow will help prevent out of pocket expenses and save you valuable time in the event that you do need a tow.