Argentine Tanker Survives torpedo Attack

The transcript describes a ship that remains afloat despite being hit by two torpedoes. Initially, it was thought the damage was due to American mines, but evidence of a torpedo on the ship suggests an Axis submarine was responsible. Although the ship is safe, it will be out of service for three months for repairs.

What conclusion can be drawn about the submarine involved?

How long will the ship be laid up for repairs?