Can anyone tell me what the difference is between the "I"...

By Alex Karman Ranked #87 - Navigation January 11, 2009

Can anyone tell me what the difference is between the "I" and "I/O" models is? According to the owner's manual, both transmit over 406 MHz, and also over 121.5MHz. So that, I take it is not it. On page 15 of the manual, though, they spend a lot of time talking about DOWNLOADING INFO FROM AN EXTERNAL GPS RECEIVER--if the units already have an on-board GPS receiver, why would this be necessary? Is it a back-up? Because they also talk about the On-board GPS acquiring new data, but they also say that the I/O model is the only one that does that. Does the "I" stand for "Interface," and the "O" stand for "on-board?" Does that mean that the I/O has an on-board receiver that can be used to determine LAT/LON and that the I PLB requires an external receiver to get that info? Basically, is the difference that the "I" model needs the coordinates to be acquired using an external GPS receiver because the "I" model doesn't have one, and the "I/O" model DOES have a receiver?

View Details: ACR Terrafix 406 GPS I PLB

Helpful Votes: 0 Yes