drm wrote: ↑September 12th, 2019, 8:30 am
Here's the thing about the ACR - if it is just a basic PLB, how can you know if it is any better at connecting to GPS than the Garmin?
There is some misunderstanding on how a PLB works. It is not simply reporting your GPS location (a relatively new addition to an PLB). It transmits on a frequency to satellites for use by SAR. First it transmits to a geostationary satellite (GEOSAR). It also transmits the 406MHz signal to polar orbiting satellites (LEOSAR).
These LEOSAR satellites will use the transmitting signal to determine (Doppler) your position regardless of GPS data being transmitted (or if no GPS signal is even present!). Finally, when SAR begins to search in the general area, another signal (121.5MHz) is used to "home in" on your location once SAR arrives in your general vicinity. Also, if you registered your device, your emergency contact person is contacted, and perhaps providing more information as to your general location.
In the event that a _real_ life threatening event occurs and an SOS needs to be initiated, the PLB uses 4 methods: 1) GEOSAR detection of 406MHz signal; 2) transmitted GPS location to GEOSAR satllite; 3) LEOSAR Doppler detection of signal; and 4) local SAR team triangulation of 121.5MHz signal.
Both InReach and SPOT use less than 1 watt and only the transmission of your GPS location. And in my experience with InReach it can be off my a mile, literally, and sometimes no signal was sent! Because my ACR ResQLink is only activated when needed, it will transmit to all satellites and local SAR teams for 30 hours at the full 5 watts of power. The use of either InReach or SPOT is a decent decision for safety in the back-country! There is no denying that. However an PLB is the
best decision for unmatched reliability and location detection.
Understand this one thing, a device like the ACR ResQLink is designed for the one specific task of getting you rescued, reliably!!!