@fesix There was a recent test of packet/APRS on 437.825 MHz, and another 70cm packet/APRS test is coming up after the SSTV event.
The Russian side of the ISS has an older TM-D710 (not a G version with GPS) that may still be fully functional. That radio doesn't have the customized firmware to make it easier for ISS crews to use, so changes to that radio need to be laid out in procedures sent up to the ISS, until a replacement TM-D710G is sent up there.