Bear J
The one you refer to is a version of the Tu-142. There are around 12 of these Tu-142MR Bear J aircraft. They deploy a long wire antennae from the housing below the fuselage used for submarine radio relay missions. They are more easily identified by the forward facing 'pod' on top of the tail. Not to be confused with the similar aft-facing MAD boom on the later Bear F MPA variants.
he he he ORAC beat me by seconds ...