All large vessels like carriers and amphibs will have a "torpedo protection system", by which Intrepid apparently means the particular arrangement of below-waterline compartments on the sides of these ships such that they store fuel and water in bulkheads along the outer edges of the ship and make it more resistant to damage from a torpedo:
Translation: "This dual-deck is dual-decked (???). This isn't an actual carrier segment. There will be a time gap [between DL and JN?]."
There is a difference between longitudinal bulkheads with room accessible at both sides and a real passive torpedo protection system. Carriers like the British Invincible class or Queen Elizabeth class had/have no classic torpedo protection system, same as amphibious helicopter carriers. Destroyers have even no longitudinal bulkheads, there is simply no space to include such a system.
is it?
Those are very high speed anti-torpedo, torpedoes. On the carriers they are positioned in four places, ech place has two cradels to fire torpedoes and hold six torpedoes each. So there are twenty four anti-torpedoes, six on the four corners.
