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Pilotage Paradox

by Paul Drouin

The Cosco Busan accident, as with many others that have the same root cause, can be categorized into what I call the pilotage paradox. For on the one hand, we wish to confide the safety and con of the vessel to the pilot, yet on the other insist it is the crew and captain that are ultimately responsible and accountable for the safe conduct of the vessel.

In the seven minute interval between leaving the inner harbour and striking the bridge pylon, the pilot gave 13 helm orders without the slightest indication on the bridge of the Cosco Busan that anything was amiss. We know this because the National Transportation Safety Board (NTSB) has left an amazing amount of information on their public docket website, including transcripts of the bridge voice recordings.

Leaving berth 56 (Port of Oakland) and passing under the San Francisco-Oakland Bay Bridge is a relatively simple matter, even under blind pilotage conditions, as only two course changes bring you through the span. The Delta-Echo span of the bridge is wide, with a horizontal clearance of 673 meters, and is equipped with a RACON dead center of the span. For the Cosco Busan, winds were light and the vessel would be stemming the flood current as it passed under the bridge. This maneuver should not give an experienced 3rd Mate cause to sweat, much less an experienced pilot.

Under keel clearance was not great for the Cosco Busan, however, and as a consequence hydrodynamic forces on the hull caused by the flood tide would have been strong as the vessel’s sidebody came to obstruct the flow, which was setting at approximately 130° (T) near the bridge and anywhere up to 168° (T) further from the bridge. [Continue Reading →]

Coast Guard Photo By CWO Scott Epeprson

I thought I would list a few podcasts, interviews and audio files that relate to the Cosco Busan Incident and the resultant oil spill in San Francisco Bay. If you find any more of interest please leave a comment with link below.

Our first file (click on the player below) is a very informative hour long discussion I heard on the radio earlier today. It is from KQED’s Forum and is nationaly syndicated by NPR. (Direct Link)

With a criminal probe now launched by the U.S. attorney in San Francisco into Wednesday’s crash of the container ship Cosco Busan, Forum looks at whether oil spills are preventable.
Host: Michael Krasny
Guests:

Debbie Hersman, board member of the National Transportation Safety Board

Paul Rogers, resources and environment writer with the San Jose Mercury News and managing editor of QUEST, KQED’s weekly science and environment program

Rear Admiral Craig Bone, the U.S. Coast Guard’s top official in California; and George Miller, Democratic congressman from California’s Seventh District.

Robert Bea, professor of civil engineering at the University of California at Berkeley

First is the audio file from the US Coast Guard Commandant , Admiral Thad Allen’s meeting with the San Francisco Chronicle. (Direct Link)

Coast Guard talks with Chronicle

Coast Guard Commandant Adm. Thad Allen and Rear Adm. Craig Bone spoke to The Chronicle Monday morning about the oil spill and the Coast Guard’s response time to the incident. Here’s what they had to say:

 

 KQED Forum - Cosco Busan Oil Spill: Play Now | Play in Popup | Download

 

 Coast Guard talks with Chronicle: Play Now | Play in Popup | Download