How might the Soviet Navy protect northern convoys from NATO submarines?

How could Soviet convoys moving along northern Norway defend themselves against Royal Navy submarines?

Escorts could use continuous active sonar, station passive listeners ahead of the convoy, and expend plentiful anti-submarine rockets or depth charges to force suspected submarines to move and reveal themselves.

A deliberately aggressive convoy screen could support a fast northern land campaign. Ships near the convoy could transmit active sonar continuously while other escorts sprinted ahead, stopped, and listened for echoes or submarine movement. The tactic would create false contacts and reveal transmitting ships, but Soviet RBU anti-submarine rockets and depth charges were numerous enough to probe suspicious areas without spending a torpedo on every return. Its aim would be to force passive NATO submarines to manoeuvre, betray their position, or remain outside an escort corridor long enough for critical supplies to pass.