KK7FIU-10 operates as an Tx iGate. This station sends and receives to and from RF and internet. There was a lot of confusion as to what icon to identify my station on the map, but I found clarity and guidance exactly what to do and why:
"...b. Change your icon. To let others know that you are an IGate, you should adopt a black diamond. The overlay will vary. The letter “I” was the standard and is still very common. However, Bob Bruninga, the creator of APRS, has asked for more specificity. Overlay a “R” for receive only (more on that in a bit), a “T” for a station that will transmit one hop, or a “2” for a station that will transmit two hops (less common)..."
Source: Build an APRS IGate – WCARES
Thus, for a Tx iGate identified in my raw packet by a black diamond with "T" overlay:
@012340z4256.98NT11228.21W&iGate
Reporting format:
@<time>z<lat>T<lon>&<comment>