 Because "Greeneville" had not maintained a steady, slow course for a sufficient amount of time, the sonar data available to the Fire Control Technician of the Watch FTG1/SS Patrick Seacrest did not allow accurate determination on "Ehime Maru"'s range or course.Also, due to time constraints placed by Waddle, the ship did not perform normal maneuvers which would be used to obtain accurate course and range information on the sonar contacts prior to proceeding to periscope depth.At 13