POSTING ON SHELL BLOG BY “OUTSIDER”
Dry towing a drillship? Something must be very seriously wrong. And when the Kulluk comes out of the water the damage to the hull will be clear for all to see – look forward to seeing the photographs!
RELATED COMMENT
The practice of dry towing is used when a vessel is transported on the deck of a heavy lift vessel.
For the Kulluk, this will expose the damaged underside for all to see. Dry towing of the Kulluk makes sense because the speed of the heavy lift vessel is 2-3 times faster than could be achieved with a conventional tow.
Dry towing of the Discoverer is somewhat unusual because the drillship should have been capable of sailing under its own steam at about the same speed as a heavy lift transport vessel. The use of a dry tow implies that the vessel is unseaworthy. Perhaps the Discoverer was more seriously damaged when it went aground last summer than Shell admitted? Or perhaps the recent explosion was more than just a “backfire”?
It’s a pity the exclusion zone will prevent anyone taking photographs when the vessels are lifted out of the water.
If you look at Google images, you’ll find plenty of examples of heavy lift dry tows. There are comparatively few examples of large ships being dry towed, but a well-publicised case was the USS Cole (heading photo above) after it was attacked in harbour. See http://en.wikipedia.org/wiki/USS_Cole_bombing for example.