OK, but: how should Moskva have sent any SOS signals if, according to RUMINT from both Russia and…

OK, but: how should Moskva have sent any SOS signals if, according to RUMINT from both Russia and Ukraine, already the first explosion blew up the bridge (which can be expected, considerign all the SS-N-12 missiles packed around that bridge), killed the captain, and thus destroyed all the means of communication?