EPIRB's - Printable Version +- Fishing Forum (https://bigfishtackle.com/forum) +-- Forum: Misc. Fishing Forums (https://bigfishtackle.com/forum/forumdisplay.php?fid=335) +--- Forum: Fishing Boats (https://bigfishtackle.com/forum/forumdisplay.php?fid=70) +--- Thread: EPIRB's (/showthread.php?tid=302759)

EPIRB's - tomc - 01-20-2007 [font "Verdana, Arial, Geneva"][size 2]An EPIRB is a small battery-powered transmitting device that is carried on board.. As the name implies, it is used only in case of emergency and usually only as a last resort when your marine radio is inoperable or out of range. [/size][/font] [font "Verdana, Arial, Geneva"][size 2]There are several types of EPIRBs. If disaster strikes, some float free and automatically activate; others must be activated manually. All EPIRBs float and will send out a continual signal for 48 hours. Since EPIRB signals are primarily detected by satellites that pass overhead, occasionally there may be a delay in detection (perhaps an hour) because there is no satellite currently in the area to pick up the signal. Once activated, the EPIRB should be left on to make sure the signal is available for detection by the satellite and for purposes of homing in on your location.[/size][/font] [indent] [font "Verdana, Arial, Geneva"][size 2]EPIRBs that operate on 121.5/243 MHz (category II) are the least expensive and least capable. They may cost around $400.00. These were designed in the 1970's to alert aircraft flying by. They are not well suited for satellite detection because of the problem of distinguishing them from other signals on the same frequency. Often, multiple passes of the satellites are required to identify the signal, which can definitely delay the rescue.[/size][/font] [font "Verdana, Arial, Geneva"][#ff0000][size 3]The one you want[/size][/#ff0000][/font][font "Verdana, Arial, Geneva"][#000000][size 4] [/size][/#000000][/font][font "Verdana, Arial, Geneva"][#000000][size 2]is the 406 MHz EPIRB (category I) which includes a 121.5 MHz signal which is mainly used for homing. This one is more expensive (around $1400.00) but what is your life worth? Response time to the 406 EPIRB is dramatically reduced and the position information it provides is much more accurate. Additionally, the 406 EPIRB's signals are coded, allowing non-EPIRB signals to be filtered out. They also provide other valuable information which will help the search and rescue efforts. At the time of purchase you can register your EPIRB and part of the coded signal will include your name, address, phone number, vessel description, and an emergency contact shoreside who will know of your plans and capabilities. Once the satellite picks up the signal and transmits it back, the search and rescue team knows where you are and who you are.[/size][/#000000][/font][/indent] [indent] [font "Verdana, Arial, Geneva"][#000000][size 2]The 406 EPIRB is carried on all U.S. flag merchant vessels and is required on commercial fishing vessels operating beyond three miles from shore (unless they do not have a galley and sleeping facilities). EPIRB's are also required to be licensed by the Federal Communications Commission. They should be listed on your ships station license. Although EPIRBs are not required on recreational vessels, the U.S.C.G. strongly recommends them and strongly suggests that the choice be the Category I, 406 MHz model. Its long-reaching, long-lasting signal can make a significant difference in the speed and effectiveness of rescue efforts.[/size][/#000000][/font] [font "Verdana, Arial, Geneva"][#000000][size 2]In a recent test of the 406 MHz model, a Naval Academy midshipman found out how effective it was. The test signal was identified within four minutes and pinpointed within 15 minutes. If that is not enough to convince you, the comparison chart below may help you make up your mind whether or not you want to "bet your life" to save a little money.[/size][/#000000][/font][/indent] [font "Verdana, Arial, Geneva"][#000000][size 2]Category I, 406 MHz model [/size][/#000000][/font] [font "Verdana, Arial, Geneva"][#000000][size 2]Category II, 121.5/243 MHz model [/size][/#000000][/font] [font "Verdana, Arial, Geneva"]Global detection - Regional satellite earth station not needed[/font] [font "Verdana, Arial, Geneva"]Regional earth station needed - not available in many ocean areas. Potential for detection by overflying aircraft.[/font] [font "Verdana, Arial, Geneva"]Reliable beacon with low false alarms and high probability of detection.[/font] [font "Verdana, Arial, Geneva"]Beacons often incompatible with satellites. Designed for detection by aircraft. High number of false alarms is typical.[/font] [font "Verdana, Arial, Geneva"]Beacon signal coding and exclusive international use of the 406 MHz frequency band for distress beacons assures a signal received is from an EPIRB - no problem with false alerts from non-beacon sources[/font] [font "Verdana, Arial, Geneva"]High false alert rate due to alerts generated by other transmitters within the 121.5 MHz[/font] [font "Verdana, Arial, Geneva"]1.5 nautical mile accuracy and a second signal provided to use for homing.[/font] [font "Verdana, Arial, Geneva"]10-20 nautical miles accuracy. Search and rescue forces can home on the primary signal.[/font] [font "Verdana, Arial, Geneva"]Beacon is coded with owners name, address, phone, vessel type etc.[/font] [font "Verdana, Arial, Geneva"]No way to know whether signal is from an EPIRB, similar aviation beacon, or non-beacon source. No coded information with signal.[/font] [font "Verdana, Arial, Geneva"]Good ambiguity resolution, i.e. can promptly launch rescue unit to a known position with an alert from a single satellite pass.[/font] [font "Verdana, Arial, Geneva"]Hard to know which of two separate positions calculated with first satellite pass is the beacon location. Usually must wait for a second satellite pass to resolve.[/font] [signature] Re: [tomc] EPIRB's - tomc - 01-20-2007 by Chief Warrant Officer Jim Krzenski, Commanding Officer, [size 2]U.S. Coast Guard Station Fort Pierce[/size] [font "Verdana, Arial, Geneva"][size 2]Today is the fourth day at sea on your 50 foot commercial fishing vessel. Your fish hold is almost full. After another good day of fishing you and your crew will be able to head to the fish house with a profitable catch. It has been a long day of back-breaking work and now it's time for you and your two man crew to get some well-deserved rest. You decide to anchor in about 35 feet of water, five miles offshore. You energize the anchor light and call it a night. You decide not to maintain a live watch on the bridge but you do set your radar alarm at three miles so that any vessels approaching within this distance will activate the alarm and awaken you, Your vessel is not equipped with a bilge alarm to warn you of flooding. There is a 3 to 4 foot swell causing the heavy fishing vessel to slightly pitch and roll on its anchor rode.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]At three in the morning you are awakened from a deep sleep by salt water rising over your lower bunk. Several causes quickly pass through your mind. Maybe it's that loose hull plank I did not get a chance to repair, or maybe it could have been caused by a cracked and leaking salt water line, maybe a faulty stuffing tube. There is no time to analyze further. The water is rising too quickly. Fighting to remain calm, you quickly awaken your crew, still dry in their upper bunks. You yell for them to get up on deck. The VHF radio is inoperable due to being shorted out by the rising water. You and your crew quickly put on your life jackets, grab your emergency positioning radio beacon (EPIRP) and enter the 72 degree water, as your boat continues to steadily disappear into the sea beneath you. Less than a minute later, the last you see of your boat is the fading white anchor light atop your main mast, as it slips beneath the black sea. Your life raft is no where to be found in the darkness of night. The three of you float there alone, clutching your EPIRB, on the vast expanses of the sea.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]Fortunately, your properly registered 406 MHZ EPIRP signal is received by an overhead satellite, and then transmitted to a ground tracking station. Within minutes, the nearest U.S. Coast Guard Rescue Coordination Center receives your distress signal and position. Due to you having properly registered your EPIRB with the National Oceanic and Atmospheric Administration (NOAA) the Coast Guard also knows who you are. Within minutes, a Coast Guard search and rescue unit has been dispatched to your position. A short time later the Coast Guard arrives on scene to observe three men in their life jackets closely huddled around a bright orange 406 MHZ EPIRP.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]A short time later you are safely standing on the deck of the Coast Guard boat rehearsing in your mind each step that led to this moment and questioning yourself over and over. Maybe I should have invested in that bilge alarm? Maybe I should have maintained a live watch on the bridge? You are very dened that you have lost your vessel and catch. After a while you wisely decide to count your blessings. You realize that what is most important is that due to the EPIRB you and your crew were able to walk away with your lives.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]The described scenario actually occurred at a station to which I was previously assigned. Many a mariner has been saved since the advent of EPIRBS. Whether legally required or not, it is the wise mariner who ensures there's an EPIRB on board before voyaging offshore. There are primarily two types of EPIRB's used by the boating public.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]The first type is the Class "A" EPIRB. It transmits on VHF 121.5 MHZ and UHF 243 MMZ simultaneously. This EPIRB is detected by Search and Rescue Satellite-Aided Tracking (SARSAT) and by aircraft flying overhead. The class "A" EPIRB’s position accuracy is advertised to be less than 20 miles. The Coast Guard receives many false alarms from this EPIRB. I'd be a rich man if I had a dollar for every time my crews have homed in on a Class "A" EPIRB signal only to locate the source originating from a boat that was some place on shore or moored to a dock. This is why it is so important to remove the battery from your EPIRB if your boat is going to be in storage for any length of time. This will prevent its accidental activation. A manually activated Class "A" EPIRB can be purchased for as little as $150.00. A float free self activating Class "A" EPIRB can be purchased for less than $1200.00. Class "A" EPIRBs should be tested every 60 days by activating within five minutes after any hour for one second.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]The second type is the 406 MHZ EPIRB. This is the EPIRB which takes the search out of search and rescue. This is the EPIRB the Coast Guard recommends all offshore mariners use. In some cases it is legally required to be used. It transmits on 406.025 MHZ and VHF 121.5 MHZ simultaneously and is accurate to within 3 miles. Search and Rescue Satellite-Aided Tracking (SARSAT) will accurately detect these EPIRBs. Each owner of a 406 MHZ must ensure that their registration data card is completed and submitted to NOAA. In the event of your distress, proper registration will aid search and rescue units to identify you. To ensure proper use as well as to prevent accidental activation carefully read and adhere to all Manufacturer's operating instructions. The 406 MHZ EPIRB should be tested every 30 days. Usually this EPIRB is tested by pressing the test switch. The test light should flash for 4 seconds to indicate that it's functioning properly.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]The legal requirements to carry an EPIRB vary with the type of vessel. Although recreational vessels are strongly encouraged to carry an EPIRB on board there are no legal requirements that they do so. Commercial fishing vessels that are 36 feet and larger, and operate beyond three miles from shore, and have a galley and berthing on board, are required to carry an EPIRB. Many commercial fisherman owe their lives to this requirement. Coast Guard inspected merchant vessels, operating in Coastal or Ocean trade, beyond twenty miles from shore, are also required to carry EPIRBs.[/size][/font] [font "Verdana, Arial, Geneva"][size 2]There are many additional things that the mariner can do to stay safe. To learn more, please call the USCG Auxiliary Boating Course Information Line at 1 (800) 336-5647 to obtain information on the course offered nearest to your location. If you have other boating safety-related questions, please call the Coast Guard's Boating Safety Hotline at 1 (800) 368-5647. May all of your boating be SAFE.[/size][/font] [signature]