Airmar GH2183 update

[lateral]

Anyone updated above device to GH2183_10Hz_a1_1510.ax firmware with weathercaster?
No documentation with it from Airmar on what it does.
I am still on 1329.ax. (There is a 1500.ax as well)
Weathercaster did not recognize the file and wouldn't flash it.
Perhaps I have to flash 1500.ax first?
Or disconnect everything on the network other than GH2183?
PIA!

[lateral]

No .UPD.
Somewhat odd.
Emailed Airmar.