Tagged ‘Wi-Fi’
McMurdo SmartFind
Similar to ACR’s ResQFix PLB, McMurdo has introduced a GEPIRB (GPS-equipped Emergency Position Indicating Radio Beacon) that’s
smaller yet supposedly performs better.
The 1.5-pound SmartFind Plus accomplishes this largely by using LEDs for its strobe, which along with automatic seawater activation, built-in flotation, and longer transmission life are what distinguish EPIRBs from PLBs (plus the fact that some models come with an automatic float-free mount).
Note that Simrad has also introduced a compact GEPIRB in the same price range and that both companies also offer GPS-less models, but those will typically take longer to deliver less-accurate position information to the SAR authorities.
ACR ResQFix
ACR’s ResQFix Personal Locator Beacon is 35 percent smaller and 25 percent lighter than its previous AquaFix model and yet
purportedly performs better.
This is not so trivial when you consider that this six-inch-high unit is meant to acquire a fast GPS fix in tough conditions (like from its float bag next to you in a rough sea), transmit that position and your ID via 406 MHz to the search-and-rescue satellite system, and also send out a 121.5-MHz signal that rescuers can home in on (note that your own yacht could use that homing signal too).
My confidence in this complicated technology was bolstered when I visited ACR’s factory last year and saw both its elaborate GPS simulation facility, used to fine-tune the Pill’s receiver, and its extensive testing routines. The $750 ResQFix, which uses a five-year lithium battery and is waterproof to 33 feet, also has its two circuitry, battery power/voltage, and GPS acquisition testing built in. Note that PLBs like this are also carried by small aircraft pilots and others who venture into wilderness, watery or otherwise.
How To Use Emergency Radio
1. Phonetic Alphabet
Clear communication is critical when sending emergency VHF messages. To avoid any confusion, use the phonetic alphabet to spell out important information, such as your boat name and the names of your crew. Below is the NATO/International phonetic alphabet.
A = alpha B = bravo C = Charlie D = delta E= echo
F = foxtrot G = golf H = hotel I = india J = Juliet
K = kilo L = lima M = mike N = November O = Oscar
P = papa Q = quebec R = romeo S = sierra T = tango
U= uniform V = victor W = whiskey X = x-ray Y = yankee
Z = zulu Read the rest of this entry »
Cobra 425 VHF
The big consumer electronics company Cobra has gotten serious about marine VHF, introducing both this feature-packed handheld and
a Class D DSC fixed radio. For instance, the $170 HH425 and the $190 F80 are each submersible and backed by three-year warranties.
Both also offer a “rewind, play again” feature that space shots like me will find handy—a built-in memory chip records the last 20 seconds of whatever breaks squelch on the channel (s) you’re monitoring, giving you a second chance to catch a call.
The 425 also includes a full 5-watt GMRS (a.k.a. “family radio”) transceiver, along with goodies like privacy codes, individual caller rings, and VOX (hands-free) operation. That means that with a couple of inexpensive GIVIRS handsets, perhaps from market leader Cobra, you’ll have a sophisticated communications network for use around a marina and beyond (unlike VHF, GMRS is land legal).
You can even set up the 425 to scan both selected VHF and GMRS channels simultaneously, though a little manual investigation is required. In fact, most of the 425’s features do entail some operational complexity, plus I found its ergonomics clunkier than more conventional handhelds, like the Icom M34.
Emergency Call Procedure
1. Hailing and Communication With Another Boat
Correct hailing procedure is to state the name of the boat you are hailing (usually on channel 16), then the name of your boat, followed by “over.”
“Over” tells the other party you have finished speaking. This is important because if both radio operators transmit at the same time, neither will be heard. Only one party can speak at a time. Any other words—”yoo hoo” or “Is anybody out there?” – constitute incorrect procedure.
Once you’ve established contact, switch to a working channel. Once you’ve switched to a working channel, say the name of the boat you are hailing followed by the name of your boat. At the end of your conversation, say your boat name and “out” or “out, (your boat’s name), returning to 16.” Read the rest of this entry »





