Since a couple of weeks I am running a APRS RX-igate on a Raspberry PI with RTL-SDR dongle and pymultimonaprs. To show on the map that it’s a RX-only Igate it’s recommended to set the black diamond with a “R” overlay as a symbol. To do this you have to use “R” as table and “&” as a symbol.

Here is my configuration:

"beacon": {
"lat": ...,
"lng": ...,
"table": "R",
"symbol": "&",
"comment": "PyMultimonAPRS iGate",
"status": {
"text": "Raspberry PI - RX Igate",
"file": false
},