The last time an ocean submersible took a crew down to Challenger Deep, the deepest known point in the Mariana Trench (about 36,000 feet below the surface), it was 1960. Now, submersible designers Triton Submarines aims to take humans down to Challenger Deep again using their newly designed submersible Triton 36,000.

The Triton 1000 Modeled after earlier iterations of Triton's submersibles, the borosilicate glass dome of the Triton 36,000 will be able to withstand far greater pressures. Triton Submarines.

This is something of a technological leap for Triton. Its current submersibles are mostly designed for scientists and yacht owners and only dive to depths of about 3,300 feet. To move its maximum depth by an order of magnitude Triton enlisted the help of Rayotek Scientific, who redesigned the company’s domed passenger compartment with a novel new kind of material.

Triton 36,000, in Profile:  Triton Submarines.

This borosilicate glass gets stronger under compression, so the deeper you take the submersible, the stronger the glass gets. Up to a point, of course. Before Triton 36,000 attempts to take a crew of three down to the deepest point in the oceans, it will have to undergo testing at pressures at least one and a quarter times the pressure at Challenger Deep.

Source: PopSci