BushwickBill
Registered Abuser
- Joined
- Jul 13, 2005
- Posts
- 822
you're an idiot, see I said it simpler that Avboog
I'm an idiot? Yeah.... better than switchbitch? Hmmm. Not sure but I am sure the terms are equally inappropriate.
You choose metro: Your incapacitated in the heat. 406 or 121.5? 20k resolution or 100meter? Over 60% of the earth or full earth coverage?
Let the idiot know please. I'm curious what such an accomplished, experienced aviatior such as yourself has to bring to the table in terms of an intelligent opinion.
From Wiki:
Traditional ELT, unregistered
The oldest, cheapest (US$ 139) beacons send an anonymous warble at 121.5 MHz. They can be detected by satellite over only 60% of the earth, require up to 6 hours for notification, locate within 20 km (search area of 1214 km²) and are anonymous. Coverage is partial because the satellite has to be in view of both the beacon and a ground station at the same time - the satellites do not store and forward the beacon's position. Coverage in polar and south-hemisphere areas is poor. The frequency is the standard aviation emergency frequency, and there is interference from other electronic and electrical systems, so false alarms are common. To reduce false alarms, a beacon is confirmed by a second satellite pass, which can easily slows confirmation of a 'case' of distress to up to about 4 hours (although in rare circumstances the satellites could be position such that immediate detection becomes possible.) Also, the beacons can't be located as well because their frequency is only accurate to 50 parts per million, and they send only 75-100 milliwatts of power.
http://www.cospas-sarsat.org/FirstPage/121.5PhaseOut.htm
With a 121.5 MHz beacon, only one alert out of every 50 alerts is a genuine distress situation. This has a significant effect on the resources of search and rescue (SAR) services. With 406 MHz beacons, false alerts have been considerably reduced (about one alert in 17 is genuine) and when properly registered can normally be resolved with a telephone call to the beacon owner using the encoded beacon identification. Consequently, real alerts can receive the attention they deserve.
When a 406 MHz beacon signal is received, SAR authorities can retrieve information from a registration database. This includes beacon owner contact information, emergency contact information, and vessel/aircraft identifying characteristics. Having this information allows SAR services to respond appropriately. Make sure your 406 MHz beacon is properly and accurately registered!