Excessive water pressure at depth would implode the Sub destroying it and all soles within.
The 'Nereus' ROV, owned by Woods Hole Oceanographic Inst. has dived to 34,000 feet in the Challenger Deep, one of the very deepest parts of the Pacific ocean.
The maximum depth of oceans is 10,923 meters/6,787 mi.
the maximum depth of lake ontario is 244m or 803ft
22,788
what is the maximum depth of a deep-focus earthquake
The maximum depth of river Kaveri is about 217 ft deep
Varies by submarine, based on its hull design and materials. Generally 400m+ for modern submarines, although the exact details are classified on many classes still in service. A submarine also is normally operated above its maximum depth and may not be able to operate fully at maximum.
This product has maximum digital depth display of 300 feet.
Eleven kilometers is the maximum depth of the Pacific Ocean.
15 feet
The maximum depth of river Kaveri is about 217 ft deep