MORRO BAY, Calif. - The oil spill response vessel, Nanuq, relaunched and recovered an underwater remotely operated vehicle as the assessment operation of the S.S. Montebello continues, Oct. 13, 2011.
The ROV used a wire brush attachment to clean the hull of the sunken tanker. For the neutron backscatter to get an accurate reading of the amount of possible oil in the cargo tanks, a 30-inch by 30-inch square must be cleaned entirely. At this time, approximately a third of the areas needed have been cleaned.
The ultrasonic thickness testing of the steel hull started with the initial readings showing a measurement of nearly a half-inch thick. This thickness level is consistent with the original design specifications of the Montebello. This reading is also used by the neutron backscatter for calibration purposes.
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