You don't tell it to use any specific I-gate. _Every_ I-gate that can hear you will forward your packets to APRS-IS. Similarly, every I-gate that heard you and is transmit-capable will transmit replies to you. However, transmit-capable I-gates
generally do not specify digipeat paths on their RF retransmissions, so if you cannot directly hear the I-gate, you won't hear its retransmission of the reply.
You might want to go mobile/portable APRS and drive near enough to the individual I-gates to hear them directly, and then query some other APRS-IS server service like WHO-IS or WXBOT to see if you can hear the replies.?
It may just be that you are not in direct range of a transmit-capable I-gate.?
Andrew, KA2DDO
author of YAAC
Ah, that's probably it then. The closest i-gate to me (about 3 miles) is receive only. I don't suppose there's any way to send a message and tell it not to use that i-gate? There are several others around me that should be able to pick up my transmissions.
Thanks
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