Upvote:1
According to this and similar documents, Soviets did have a doctrine for tactical/theatre use of naval nuclear weapons. Goals were in order of importance:
protection of own SSNBs from enemy submarines
attack on enemy SSBNs
attack on enemy strike groups(carrier groups) armed with nuclear weapons
attack on facilities supporting SSBNs and other strategic vessels
First two goals are pretty straight-forward. SSBNs were primary weapons for second strike on both sides. Protection own and destroying opponent's was utmost imperative if situation deteriorate close to all-out nuclear war. Soviet ASW means were considered inferior to Western at that time, therefore liberal usage of nuclear ASW weapons (torpedoes , rocket-torpedoes etc ...) could by brute force compensate for unprecise detection.
As for carrier groups, Soviet doctrine called for nuclear strikes against them only when those groups themselves presented nuclear threat. This was particularly true latter in Cold War when Soviet Naval Aviation and Soviet SSGNs had means to attack them from long range with conventional weapons. Considering geography and composition of forces, it is highly unlikely that USN would risk carrier groups for nuclear attacks, because they no longer had advantage of being out of range of enemy.
Note that in late 50's and early 60's (Cuban missile crisis) when had doctrines that envisioned use of nuclear weapons more freely . This is because ICBMs only started to be introduced at that time, MAD was not completely implemented, and effects of full blown nuclear war were not entirely comprehended (nuclear war could be "won") . A that time, Soviet sub could potentially have authorization to launch nuclear weapons preemptively in case of war, or suspicion of war.
Upvote:6
Soviet submarines were certainly armed with nuclear torpedoes during the Cold War.
A very well-known example was the submarine B-59 during the Cuban Missile Crisis in 1962.
During the blockade, units of the US Navy detected the submarine and deployed depth charges in an attempt to force the submarine to the surface for positive identification. Although the depth charges were of a type used for training, and so contained very little charge, the crew of the submarine believed they were under attack, and considered firing a T-5 nuclear torpedo:
Fortunately, the senior officers aboard the submarine B-59, were only authorised to launch the torpedo if they all agreed to do so unanimously. The First Officer on the submarine was Vasili Arkhipov
He refused to approve the order, and nuclear war was averted.
So, to answer your specific questions,