World's Deepest-Diving Unmanned Submarine Lost

XenonOfArcticus writes "Kaiko, the world's deepest-diving submarine was lost in in late May off Japan, after it snapped its tether as a typhoon approached. Kaiko entered the record books in 1995 by diving 36,008 feet to the bottom of the Challenger Deep - the ocean's deepest point."

Comments

Re:No remote control?

[WhiteBandit]

Taken directly from the article:

Kaiko is designed to float to the surface and emit a tracking signal if its tether is broken. Although searchers briefly detected the beacon, they were unable to locate the probe and suspected it has either drifted off site or sunk to the bottom.

Re:hmmm

[Captain Nitpick]

I'm no naval engineer, but wouldn't it make sense for the onboard computer to surface the sub if communication to the ship above is lost? Then, once it surfaces, have it emit a distress signal that the master ship can hone in on

READ THE [CENSORED] ARTICLE

Kaiko is designed to float to the surface and emit a tracking signal if its tether is broken. Although searchers briefly detected the beacon, they were unable to locate the probe and suspected it has either drifted off site or sunk to the bottom.

Nitpick

[crashnbur]

I know this is a tedious point, but there are four oceans, and not everyone knows where Challenger Deep is. Also, it wouldn't hurt to let everyone know that Challenger Deep is allowed to be confused with the Marianas Trench, since Challenger Deep is the distinct section of the trench that reaches the deepest below the surface, almost seven miles.

An interesting article about how to calculate the ocean's depth was put together by Nathan Becker, a student at the University of Hawaii when the report was written in 2001.

Location of The Deep

[OctaneZ]

"Map" of location of Marianas Trench
Wikipedia entry for Challenger Deep
The Trench is located east of the Matianas Islands

Hope this helps you find it.

The ocean in question would be the

[DoraLives]

Pacific.

Re:hmmm

[Almost-Retired]

'scuse me, but how are you going to blow the tanks when the exterior pressure is sufficient to keep your liquid CO2 liquid by a factor of 20+. CO2 can be kept liquid at a pressure of a few hundred psi at room temps, somewhat less at the somewhat lower water temp. In the bottom of the Challenger Deep, the external pressure is in the range of 15,500 psi. Your liquid CO2 may even be a solid.

What you do is drop (release) the ballast weight that made it heavier than water and become lighter, in the case of the Trieste, something like 9 tons of ballast was released when it was time to come back up.

--
Cheers, Gene, who knows a wee bit about the Trieste since it was wearing tv cameras I helped build when it made that dive. I was working as an ET at Oceanographic Engineering in San Diego at the time.