Maritime Cell Service
The Coast Guard encourages boaters to put money into a VHF-FM radio as their main means of misery calling. Except your radio is older than the hills, and except there have been some outdoors influences that could cause a premature death, you may want to have an analysis completed before shelling out big bucks for a new piece of digital marvel that may not perform any better’n your current radio. I’m amazed at the number of boaters who purchase and set up a brand new radio with not one bit of what I take into account common sense evaluation.
Though it may not travel as far, UHF radio waves will traverse round obstacles better than VHF. Even though you might not be required to hold a VHF radio, in case you do (and you must) you will need to keep a watch on channel sixteen (156.800 MHz) every time the radio is working and never getting used to speak. Boaters traveling on worldwide voyages, having an HF single sideband radiotelephone or marine satellite tv for pc terminal, or required to carry a marine radio below some other regulation should still carry an FCC ship station license.
For our example let’s assume that the UHF wavelength the radio uses is about a foot and a half lengthy and an identical VHF radio is around five ft lengthy. Note that vary is additive and relies on the antenna height of the other station. The Coast Guard announces urgent marine info broadcasts and storm warnings on channel 9 in the First Coast Guard District solely (waters off the coast of northern New Jersey, New York, and New England).
Meaning the antenna on the radio may be shorter than an equivalent VHF radio. One of the downsides to UHF is that the FCC requires you to get a license to function in these frequencies. There are 5 channels within the MURS frequencies with 38 privacy codes underneath each one that enable you to solely pick up conversations in your code. An antenna at a thousand toes has a spread of forty five miles with no obstacles plus the height of the ship’s antenna.
Since the object is three foot extensive it’s going to totally block the UHF sign whereas the VHF signal will get round it. Decrease frequencies reminiscent of VHF diffract around massive easy obstacles extra simply, and so they also travel extra simply through brick and stone. There are more available channels with UHF so in more populated areas UHF may be much less more likely to have interference from different methods.