I’ve always two receivers covering the 8 and 12 MHz DSC channels. And sometimes you catch something new… last night Bandar-e-Anzali radio from Iran was received on 12 MHz (12577 kHz).
Funny detail: Anzali is a port on the Caspian Sea, but the message was to acknowledge a DSC test from CHEMROAD QUEEN, a Panamese flagged tanker anchored near the port of Al Jubail in the Persian Gulf. There is no waterway to connect the two.