Yes. Marine radios are installed in large ships and most boats. If your boat is small you aren't required to have one, but you can install one in your boat and it should work just fine. http://www.rightchannelradios.com/pages/vhf-marine-radios-faq-pv-c0-121.html
You can find marine radios for sale in Dallas at Dallas Boats. They have a huge selection.
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The West Marine website and Overton's both have a variety of marine radios listed, some on sale. In addition, stores like Cabela's offer marine radios for offline shopping.
Uniden marine radios are waterproof so they stay completely dry if submerged, and they float! Most other marine radios are water resistant so there is no guarantee of its performance if wet. Uniden marine radios cost much less than comparable marine radios with the same features, making Uniden a good buy.
Marine band radios are two-way radios which are used either in a military setting or by officers for easy communication. The purpose of these radios is to get a greater range of communcation.
The prices of marine radios can vary depending on which one you choose and which features you require. Lower end radios start at around 70 dollars and go up from there.
All of the Uniden Marine Radios are at least waterproof. Some models are even submersible. You can compare the different options at: http://www.uniden.com/marine-electronics/icat/marine_b2c/
Handheld Marine radios are intended to work in almost any location including overseas. An operator can use them in the middle of the ocean. They function off of the Global Positioning System or GPS.
They have radios stationed in all boats. <><><> Well, there are radios in MOST ships, and many boats. Besides radio, ships communicate with each other by horn signals. There is a standard set of signals that indicate actions that a ship is about to take.
It appears that a marine band radio would work on land but is not supposed to be used for only inland communications. Marine to inland or mobile vehicles can use these but it can be illegal to use them inland. See http://en.wikipedia.org/wiki/Marine_VHF_radio
Handheld marine radios are designed to be used over long distances at sea and are usually more sturdy thatn other handheld radios. Www.westmarine.com/MarineElectronics has a large variety .
Marine VHF radios are really appreciated after the crisis. You can buy them from your local Boat dealers or in various online stores like Amazon or eBay.