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Precis File
SHIP NAME: Oregon Standard KEY: NUM. ENTRIES: 3
source MIT79
type D
volume
material
dead
link

says non-modal collison with arizona standard, meeting, fog, yes radar, yes communciation, no maneuver until too late


source USCG
type D
volume 800KG
material
dead 0
link http://www.uscg.mil/hq/g-m/moa/boards/arizonoregon.pdf

Both ships were loaded, Arizona inbound, Oregon outbound. Both were Chevron ships. Night and dense fog. They both ended up right in the middle of the channel under the bridge, not on their (starboard) side. The USCG had a Harbor Advisory Radar system in operation, using Channel 18A. But it was voluntary and the operator was prohibited from relaying "interperative" information. Arizona was in contact with HAR and tried on several occaision to contact Oregon. But Oregon had gone to Channel 10 (Chevron company business channel) and the one time Arizona used channel 10, apparently Oregon did not hear her, maybe because of all the fog horns. HAR stuck to 18A.

Surprisingly, each ship only picked up the other on radar intermittantly.

USCG also said both ships were going to fast for conditions, but it not clear this would have made much difference. The Oregon was down to 4 knots SOG at impact.

Oregon lost 800,000 gallons of fuel oil.


source CTX
type D
volume 800KG
material
dead 0
link

MIT79 is wrong. There was some communication, but it did not involve all the parties. It is nuts that two ships from the same company don't communicate. Nuts that Oregon did not want to talk to HAR. Nuts that HAR operator who was watching the whole thing unfold did not try other channels to talk to Oregon.

In a sense this collision was very unusual in that at least one ship tried to communicate with the other. Invariably, unless pilotage is involved, neither ship tries to talk to each other, at least prior to 2000. CTX would like to list failure to communicate as a collision cause, but it would be almost redundant.

OSIR puts the spill at 840,000 gallons of No 6 fuel oil.

Cahill has a pretty detailed description of this casualty. It appears to be based on the USCG Investigation, and like the USCG report, puts everything in terms of speed over the ground. USCG says tide was 1.5 to 2 kts settingto the NE. Cahill says eddies, etc right at the Bridge could push this locally to as much as six knots.