CHALLENGER DEEP, MARIANA TRENCH, SOUTHEAST OF GUAM (WHTM) — The first dive to the deepest part of Earth’s oceans had its start with a record-breaking ascent into Earth’s atmosphere. On May ...

Science: Deepest Dive. 4 minute read. ... Previous official record was 306 ft., set in 1915 by Frank Crilley of the U. S. Navy who reached the submarine F-4 at the bottom of Honolulu’s Pearl Harbor.

Clearly, then, there's a huge disparity between different types of submarines and just how deep they can dive, and the lack of official data and precise numbers only muddies the matter further.

In 1917, two US submarines collided off the coast of San Diego and submarine USS F-1 sank to the bottom of the Pacific Ocean, along with 19 crew members aboard. The horrible accident, whose wreckage ...

A safe dive depth for modern, Los Angeles-class submarines in the U.S. arsenal to be roughly 1,500 feet — with a maximum descent distance of around 3,000 feet.

While all that is very cool, there’s one downside to riding in a deep sea submarine: you might end up sounding pretty silly. Submarines are pretty cool bits of kit.

The submarines displaced 2,300 tons surfaced/3,200 tons submerged and were just 267 feet in length and had a beam of 31 feet. Notable Project 705 Lira or Alfa-class Facts: ...