That’s an interesting subject, these old divers are not available anymore so their data is not easy to find. As their have an excellent quality and are very durable, it’s pretty sure that some of us have still them in their fishing box. So adding them will certainly help some.
In this case, the Torpedo are still available and they were used in conjonction with the retired Deep Sea diver to reach deeper water, so we have two sets the diver alone and in conjonction.
Hope this will help.