What is a manned submersible vehicle?

Submersibles and submarines are both underwater vessels designed to operate beneath the surface of the water, but they differ in their purpose, capabilities, and design.
A submersible is a general term used to describe any vessel that can operate underwater, whether manned or unmanned.

These vehicles are typically used for scientific exploration, deep-sea research, underwater archaeology, or underwater filming.
Submersibles are often smaller in size and have limited endurance compared to submarines.

On the other hand, submarines are specialized naval vessels primarily used for military purposes, such as warfare, intelligence gathering, and strategic deterrence.

Submarines are larger and more sophisticated than submersibles, equipped with advanced navigation systems, weapons, and propulsion technology.
They are designed to operate for extended periods and have the capability to travel significant distances underwater, often at considerable depths.

Another significant difference between submersibles and submarines is their ability to resurface. Submersibles typically have limited or no capability to surface on their own and rely on surface support vessels for recovery. In contrast, submarines are capable of controlled surfacing and diving, enabling them to operate autonomously for extended periods and remain hidden underwater.

A manned submersible is a human-occupied underwater vehicle used for exploration, research, and deep-sea activities, allowing scientists and researchers to dive to great depths and study the ocean firsthand.