Clearly with limited success - That article links to https://en.wikipedia.org/wiki/Submarine_incident_off_Kola_Peninsula https://en.wikipedia.org/wiki/Submari

Clearly with limited success - That article links to https://en.wikipedia.org/wiki/Submarine_incident_off_Kola_Peninsula https://en.wikipedia.org/wiki/Submarine_incident_off_Kola_Pe... Which in turn links to https://en.wikipedia.org/wiki/Submarine_incident_off_Kildin_Island https://en.wikipedia.org/wiki/Submarine_incident_off_Kildin_... So there have been at least two other submarine collisions.