Very good idea to share the fun with a friend. There are more reasons to build a 2 person sub.
Cost just some 25% more…
Emile
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Most of the personal submersibles I’ve seen seem to be one person. Being able to take a friend seems like a cool thing to be able to do. For a dry, one atmosphere sub, does anyone know approximately how much more it is to add space for a passenger? Is it 10%, 20% or 50% of the total cost? Thanks.
Alan