ACR Electronics GlobalWatch UAIS User Manual page 22

It is possible, that the recipient's Transponder could not receive the message at all, and in this case the
following screen is displayed. It is then recommended to resend the message.
Unsuccessful Message Confirmation (no acknowledgement)
N 1^19' E
----------------------------------------
++++++++++++++++++++++++++++++++++++++++
[ ] AIS1:
[-] AIS2: Sent, but no acknowledgement
++++++++++++++++++++++++++++++++++++++++
GlobalWatch™ UAIS User Manual
0^12' |1>0.10|2>1.30|3>1.80nm
Transmission Status
18
Y1-03-0178A
Version 1.0