200 ft
Classified.
Test depth for U.S. boats was between 250' and 400' depending on the boat class.
surf around the massive island that is sootopolis city, then use dive at a deep place. there should be a cavern underwater. go in it, then you should have found the submarine. if you use dive there you can get to sootopolis :-)
The pressure of the water that deep would crush a person.
South of Cinnabar Island where that deep part is. Use dive. Get dive from ash beside fire cave in tubuli town.
The deepest dive to the bottom of Atlantic ocean was 10,994 meters deep. It was done by Don Walsh in a submarine and the dive took 4 hours and 47 minutes.
Go down from mossdeep city and when you find the deep section use dive until you see they opening if there is a submarine go in and use dive again to resurface. Enter the cave to see if there is a submarine. when you resurface go up until you reach land
they go in a deep sea trench in witch you need the hm dive. p.s. ITS TEAM AQUA.
It is almost exactly in between Sootopolis City and Ever Grande City on your map. Go there and dive underwater. Search around underwater and eventually you should find an underwater cave containing the submarine. When you find the submarine, head to the surface.
you first go to steven to get dive and dive dvie
The deepest submarine is built to go 10000 meters under water. This is so they can go to the bottom of the ocean floor.
After you find the submarine you use dive up to the surface.