but her pressure hull was not breached and there was no damage to her nuclear reactor. She surfaced and arrived in Guam on 10 January, accompanied by , , and , as well as MH-60S Knighthawks and P-3 Orion maritime patrol aircraft. The Navy stated that there was "absolutely no reason to believe that it struck another submarine or vessel." Later, an examination in drydock showed unmistakably that she had struck an undersea mountain. San Franciscos captain Commander Kevin Mooney was reassigned to a shore unit in Guam during the investigation of the collision. The Navy concluded that "several critical navigational and voyage planning procedures" were not being implemented aboard San Francisco, despite Mooney's otherwise remarkably good record. Consequently, the Navy relieved Mooney of his command and issued him a letter of reprimand. Six crewmen received non-judicial punishment hearings for hazarding a vessel and dereliction of duty, and they were reduced in rank and given letters of reprimand. Twenty other officers and men received awards for their actions in the crisis, including letters of commendation, the Navy and Marine Corps Achievement Medal, the Navy and Marine Corps Commendation Medal, and the Meritorious Service Medal. The seamount that San Francisco struck did not appear on the chart in use at the time of the accident, but other charts available for use indicated an area of "discolored water", an indication of the probable presence of a seamount. The Navy determined that information regarding the seamount should have been transferred to the charts in use—particularly given the relatively uncharted nature of the ocean area that was being transited—and that the failure to do so represented a breach of proper procedures. Nonetheless, a subsequent study by UMass Amherst indicated that the Navy's charts did not contain the latest data relevant to the crash site because the geographical area was not a priority for the Defense Mapping Agency. Moreover, a subsequent report "found that the (submarine's parent) squadron and the group could have done more to prepare the ship for sea." Specifically, it determined that the submarine's squadron "did not take adequate action to correct previously identified deficiencies in open ocean navigation onboard SFO," and did not provide adequate oversight of San Franciscos navigation performance. Additionally, "The report also notes the document known as a 'Subnote' from the Group, which laid out a path and average speed, was delivered to the ship two-and-a-half days before