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» The Geek Culture Forums   » News, Reviews, Views!   » Your News!   » NZ navy ship avoids collision with 26,000 sq km of floating rock!

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Author Topic: NZ navy ship avoids collision with 26,000 sq km of floating rock!
The Famous Druid

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Icon 1 posted August 10, 2012 09:37      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
One navy officer described it as the "weirdest thing" he had seen at sea.

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If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

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Ugh, MightyClub
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Icon 1 posted August 10, 2012 13:01      Profile for Ugh, MightyClub     Send New Private Message       Edit/Delete Post   Reply With Quote 
I wonder how long it takes such a thing to break up? Or maybe as sea life starts to accumulate on the submerged portion it will just sink. Seems like it could get pretty dangerous if it starts to hover just below the surface.

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Ugh!

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TheMoMan
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Icon 1 posted August 10, 2012 13:22      Profile for TheMoMan         Edit/Delete Post   Reply With Quote 
Ugh, MightyClub You raised a good point, pumice does not have a very high tensile strength, but submerged like a log in the way of a vessel at speed, could it puncture the hull? Could it jamb the propeller or rudder? Put dings in the props throwing them out of balance.

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Benjamin Franklin,

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Snaggy

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Icon 14 posted August 10, 2012 13:38      Profile for Snaggy   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
Wow, so cool!

When I was hiking in New Zealand, around Mount Tongariro, one of the neatest things was seeing little pumice rocks floating down the mountain streams during a rainstorm.

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GrumpySteen

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Icon 1 posted August 10, 2012 15:03      Profile for GrumpySteen     Send New Private Message       Edit/Delete Post   Reply With Quote 
It's not a 26,000 square km chunk of rock. It's a lot of these floating in a 26,000 square area. A ship would have little problem plowing through the area and, in fact, the NZ ship did just that.

"I knew the pumice was lightweight and posed no danger to the ship. None the less it was quite daunting to be moving toward it at 14 knots. It took about 3 - 4 minutes to travel through the raft of pumice and as predicted there was no damage. As we moved through the raft of pumice we used the spotlights to try and find the edge - but it extended as far as we could see."

Here's a video of the pumice float that the NZ Navy encountered.

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TheMoMan
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Icon 1 posted August 11, 2012 05:57      Profile for TheMoMan         Edit/Delete Post   Reply With Quote 
This came about as a double post, impatience.

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Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety.


Benjamin Franklin,

Posts: 5848 | From: Just South of the Huron National Forest, in the water shed of the Rifle River | Registered: Sep 2002  |  IP: Logged
TheMoMan
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Icon 1 posted August 11, 2012 06:00      Profile for TheMoMan         Edit/Delete Post   Reply With Quote 
Well you sure rained on our parade!

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Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety.


Benjamin Franklin,

Posts: 5848 | From: Just South of the Huron National Forest, in the water shed of the Rifle River | Registered: Sep 2002  |  IP: Logged
Ugh, MightyClub
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Icon 1 posted August 13, 2012 13:01      Profile for Ugh, MightyClub     Send New Private Message       Edit/Delete Post   Reply With Quote 
OK, Grumpy, that makes much more sense. Really I should have known that to begin with. Lazy conclusion-jumping on my part.

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Ugh!

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The Famous Druid

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Icon 1 posted August 13, 2012 18:40      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
From TFA:
The [top of the] rock looked to be sitting two feet above the surface of the waves

If the raft was that far above water level, I assume it extended at least as far below water.

Call me paranoid if you will, but that sounds like something I'd sail around, not through.

[edit] wow, it turns out that pumice is only 1/4 the density of water, so it would have extended only about 8 inches below water.

--------------------
If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

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TheMoMan
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Icon 1 posted August 13, 2012 20:40      Profile for TheMoMan         Edit/Delete Post   Reply With Quote 
Sort of like floating Styrofoam.

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Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety.


Benjamin Franklin,

Posts: 5848 | From: Just South of the Huron National Forest, in the water shed of the Rifle River | Registered: Sep 2002  |  IP: Logged
The Famous Druid

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Icon 1 posted August 13, 2012 22:03      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
Yeah, but harder.

Initially, I thought powering through a raft of floating gravel would do evil things to a ships propeller, but the prop would be deeper than 8", so it should be safe.

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If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

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GrumpySteen

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Icon 1 posted August 13, 2012 23:57      Profile for GrumpySteen     Send New Private Message       Edit/Delete Post   Reply With Quote 
It probably scratched up the paint job a bit and anti-fouling paint isn't cheap.

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