| Some on 121.5 only, but others...
[Re: Frozen]
#31983 04/02/04 09:14 AM 04/02/04 09:14 AM |
Joined: Jun 2001 Posts: 3,293 Long Beach, California John Williams
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Posts: 3,293 Long Beach, California | are also on other freqs like 406 (I think) with GPS and individual, registered ID number. I think 121.5 is the official search and rescue freq.
On an amusing note, we found that EPIRBs can also be picked up by the antennas used to track hunting dogs...
John Williams
- The harder you practice, the luckier you get - Gary Player, pro golfer
After watching Lionel Messi play, I realize I need to sail harder.
| | | Re: Another convenience item worth its price...
[Re: Frozen]
#31984 04/02/04 09:53 AM 04/02/04 09:53 AM |
Joined: Jun 2001 Posts: 12,310 South Carolina Jake
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Posts: 12,310 South Carolina | The ones that rely solely on the 121.5 frequency are being phased out and you probably cannot get them anymore. I have one that will communicate with coastal satellites and emit the locator beacon on 121.5 so if I'm in trouble, the satellite gives the coast guard a general area and the homing beacon brings them to me. However, the satellite capabilities of this unit are limited and satellite transmitting power is weak - it only works in coastal US areas due to the low orbit geo-syncronous satellites that it communicates with. I bought it three months ago and I'm not sure it's available anymore due to this technology being discontinued in the next few years. The 406Mhz EPIRBs are now the norm and the signal communicating with the sattelites is much stronger so that it can reach higher altitude orbiting satellites that cross oceans. If these satellites receive a signal, they record the unit ID and the location and beam it back down to earth as soon as they get over a land monitoring station. I hope I never need to use mine.
Jake Kohl | | | Re: Another convenience item worth its price...
[Re: Jake]
#31985 04/03/04 01:14 AM 04/03/04 01:14 AM |
Joined: Jun 2001 Posts: 1,459 Annapolis,MD Keith
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Posts: 1,459 Annapolis,MD | low orbit geo-syncronous satellites ... higher altitude orbiting satellites that cross oceans Actually, geosynchronous satellites are at the higher altitudes. You might have the two mixed up - the polar orbiting satellites might require more than one pass to locate you, their orbital period would be about 90 minutes, and they're at a lower altitude. The geostationary satellites are way out there - their period is 24 hours, effectively placing them continuously over a point on the Earth. From there they can see quite a lot continually, but you would require a stronger transmitter to reach them. | | | Re: Another convenience item worth its price...
[Re: Mary]
#31988 04/03/04 08:58 AM 04/03/04 08:58 AM |
Joined: Sep 2003 Posts: 270 Nepean (Ottawa) Ontario Canada Frozen
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Posts: 270 Nepean (Ottawa) Ontario Canada | Mary You have opened up a whole can of worms.  My God there's hulls and everything! I am not sure I would agree with your choice of liquids, but I am confident that fryer oil  won't be the choice. There is still about 3 to 4 feet of ice on the "Forebay", So I'm bored..... Although I have a Tiger on the way... so I'm excited... and tomorrow's me birtday.
Cheers Alan F
Tiger
| | | Re: Another convenience item worth its price...
[Re: Jake]
#31989 04/03/04 09:08 AM 04/03/04 09:08 AM |
Joined: Sep 2003 Posts: 270 Nepean (Ottawa) Ontario Canada Frozen
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Posts: 270 Nepean (Ottawa) Ontario Canada | Jake
Out of curiosity how do you test these transmitters to verify that you are not fooling yourself?
On aircraft ELT's you turn on a receiver tuned to 121.5 and then momentarily switch the ELT on and off. Obviously you should hear the beacon's wail. This is done at a specific time, which is noted in the "Airman's Information Publication" (AIP).
This allows you to check the ELT and to make sure that SAR is not dispatched on a false mission.
Cheers Alan F
Tiger
| | | Re: Another convenience item worth its price...
[Re: Frozen]
#31990 04/03/04 09:23 AM 04/03/04 09:23 AM |
Joined: Nov 2002 Posts: 5,558 Key Largo, FL & Put-in-Bay, OH... Mary
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Posts: 5,558 Key Largo, FL & Put-in-Bay, OH... | Alan, Happy birthday! But my condolences to you on being an Aries. Have you ever been able to find a compatible woman? According to my research, Aries is the only sign of the zodiac which is not compatible with any of the other signs. I can confirm that, because I am Rick's fourth wife; and, although we have been together for about 27 years, we are definitely not compatible. And guess what! Rick's birthday is tomorrow, too! If you are a typical Aries, your birthday is the most important day of the year, and you start celebrating it at least two weeks before. | | | Re: Another convenience item worth its price...
[Re: Frozen]
#31991 04/03/04 09:42 AM 04/03/04 09:42 AM |
Joined: Jun 2001 Posts: 12,310 South Carolina Jake
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Posts: 12,310 South Carolina | There's a set time every week (I can't remember but I think it is 12 noon eastern standard on every Wednesday) when you can turn the unit on for a test of no greater than 15 seconds. This unit emits a warble tone to indicate that it is working properly.
Jake Kohl | | | Re: Another convenience item worth its price...
[Re: Jake]
#31993 04/03/04 02:34 PM 04/03/04 02:34 PM |
Joined: Jun 2001 Posts: 12,310 South Carolina Jake
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Posts: 12,310 South Carolina | Boy, I was WAAAY off... he Coast Guard urges those owning EPIRBs to periodically examine them for water tightness, battery expiration date and signal presence. FCC rules allow Class A, B, and S EPIRBs to be turned on briefly (for three audio sweeps, or one second only) during the first five minutes of each hour. Signal presence can be detected by an FM radio tuned to 99.5 MHz, or an AM radio tuned to any vacant frequency and located close to an EPIRB. 406 MHz EPIRBs can be tested through its self-test function, which is an integral part of the device. 406 MHz EPIRBs can also be tested inside a container designed to prevent its reception by the satellite. Testing a 406 MHz EPIRB by allowing it to radiate outside such a container is illegal.
Jake Kohl | | | Re: Another convenience item worth its price...
[Re: Mary]
#31994 04/03/04 02:46 PM 04/03/04 02:46 PM |
Joined: Sep 2003 Posts: 270 Nepean (Ottawa) Ontario Canada Frozen
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Posts: 270 Nepean (Ottawa) Ontario Canada | Alan, Happy birthday! (Thanks!) But my condolences to you on being an Aries. Have you ever been able to find a compatible woman? (It's been all the two of us have been able to do to keep it straight and level! The ship that is.  ) According to my research, Aries is the only sign of the zodiac which is not compatible with any of the other signs. I can confirm that, because I am Rick's fourth wife; and, although we have been together for about 27 years, we are definitely not compatible. (Well Cathye and I are the first and hopefully the last mates we have had respectively. Been 26 years and two daughters under the bridge. She's an Aries too (!)  To add to the mystery of why there hasn't been a double homicide  .) And guess what! Rick's birthday is tomorrow, too! If you are a typical Aries, your birthday is the most important day of the year, and you start celebrating it at least two weeks before. (Well... hmmm... I put the deposit on the Tiger on the 27th... so well I guess that isn't quite two weeks.  ) But she's been sneakin around, sewing up a storm, won't let me near the sewing room and I swear I can smell carrot cake, but I can't find it..... Guess I can't complain! Happy B'day Rick!
Cheers Alan F
Tiger
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