The part of James Cameron's sub that was the same as the Trieste is the craft and they are both good ship.
The craft is known to be light and it is one that uses a special type of foam that makes it buoyant and also protect it from the extreme environment conditions.
Note that Trieste 1960 is said to be one that need Two pilots and it spend in its Descent the time of 4 hours, 48 minutes while DEEPSEA CHALLENGER is one that needs a Single pilot and its Descent is 2 hour and a half hours.
Therefore, The part of James Cameron's sub that was the same as the Trieste is the craft.
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