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The bridge collision sequence--About 12.55 a m on September 22, 1993, the towboat MAUVILLA, pushing six barges in a two-row, three-column combination (see p 6), departed the National Marine Fleet (mile 5) on the Mobile River. The crew comprised a captain, a pilot, and two deckhands The pilot, who had assumed the watch from the captain at 11 30 p m on September 21, 1993, said that before departing northbound, he had allowed a faster tow, the THOMAS B. McCABE, to pass. (See figure 1 for a synopsis of times relevant to this accident.)

Figure 1.--Times relevant to accident 1