An undated handout sonar image released by Joint Agency Coordination Centre (JACC) on Jan. 13, 2016 shows an iron or steel-hulled shipwreck some 3,700 metres below the surface and believed to have gone down at the turn of the 19th century.
Posted on 01/14/2016 4:13:34 PM PST by SunkenCiv
story from AP, so, not risking an excerpt.
(Excerpt) Read more at voanews.com ...
An undated handout sonar image released by Joint Agency Coordination Centre (JACC) on Jan. 13, 2016 shows an iron or steel-hulled shipwreck some 3,700 metres below the surface and believed to have gone down at the turn of the 19th century.
Maybe they’ll find Barry Soetoro’s real birth certificate.
That is a very cool picture!
Amazing how it’s casting a shadow in that deep of water.
Definitely! There was a “roarin’ 40s” wreck found last year, during this (IMHO) wild goose chase hunt for the 747, which didn’t go down anywhere in the southern Indian Ocean. I just tried a search for the topic or topics we had, couldn’t find ‘em.
Should I eat it or did I eat it?
At 2.3 miles deep the shadow isn’t caused by sunlight.
The sonar signals are very directionally dependent at very the high frequencies needed to get good resolution of “small” parts. So, at depth, if the towed sonar is slightly sideways or off-center of the nominal processed image from the computer, you DO get a very definite “shadow” effect.
I’ve seen it on 3D scanned laser images as well.
Sonar casts shadows too.
Well technically its a noise shadow not a light shadow since its a sonar pic. might be due to a drift alongside the vessel directing the noise to reflect away from the sensor.
You could make good time in the Roaring 40’s, but sometimes it came at a high cost.
At the turn of the 19th century ships were made out of wood.
The depth of the Titanic is about 12,500 feet or 2.3674242 miles.
Hi-tech images of the Titanic
The first complete views of the legendary wreck: As the starboard profile shows, the Titanic buckled as it plowed nose-first into the seabed, leaving the forward hull buried deep in mud-obscuring, possibly forever, the mortal wounds inflicted by the iceberg
The first complete views of the legendary wreck: Titanic's battered stern is captured overhead here. Making sense of this tangle of metal presents endless challenges to experts. Says one, "If you're going to interpret this stuff, you gotta love Picasso".
Ethereal views of Titanic's bow (modeled) offer a comprehensiveness of detail never seen before.
Perhaps they meant 20th Century as ships were wooden still at the turn of the 19th century.
I think they are referring to around 1900, when the 19th Century was turning to the 20th.
Iron hull ships were introduced in the late 1780s.
The fist iron hulled ships were in the mid-19th century not the beginning. The Navy’s first iron hulled ship USS Michigan was launched in 1863..
Thanks for all the shadow explanations. Learn something on here every day.
nah - i usually post drunk ;-) and don’t read the captions on the pics myself. you just caught me in a sober moment when my physics degree played out. besides my sonar chief’d have skinned my butter bar if id let it go ;-p
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