{Stus-List} Cofferdam

Steve Thomas sthoma20 at sympatico.ca
Sat Jun 20 09:25:16 EDT 2009


   The "Great Eastern" was repaired in similar fashion in the 1860s. At
almost 700 feet, she was to big for any drydock facilities, and there was
hull damage below the water line after hitting a rock. They used the hull
from an old sailing vessel, sealed up against the great ship, as a cofferdam
to complete the work.

-----Original Message-----
From: cnc-list-bounces at cnc-list.com
[mailto:cnc-list-bounces at cnc-list.com]On Behalf Of Bill Coleman
Sent: Friday, June 19, 2009 4:41 PM
To: cnc-list at cnc-list.com
Subject: {Stus-List} Cofferdam


This is an interesting 'Tool' I just learned about this year.
http://www.erieshipnews.com/images/Erie09/061809/Laud/DSC_7855.JPG

They take this box and sink it next to the ship, in this case by the
propeller, press the rubber seal against the hull and pump all the water out
and then the workers go in, climb down the ladder and replace the prop
seals.


Bill Coleman
C&C 39


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