Navigation data were not logged with the sensor data and the periodic latitude and longitude reference points were added to the file on the basis of time from Bernie Coakley's estimated position data. Intermediate positions can be interpolated between these way points.
The data represent 2 sections during which the submarine traveled virtually uninterrupted great circle routes. The section denoted "d262" starts on Sept. 18, 1996 and crosses a region near the Mendelyev Ridge for 615 km. The section denoted "d282" starts on Oct. 8, 1996 and crosses the Chukchi Cap for 436 km.