The SEWARD JOHNSON Chirp II model LSP 661 by Datasonics was used on this cruise both for recording depths and for use with the pinger on the CTD/rosette. Depths were recorded every 2 minutes, entered on the SEWARD JOHNSON SJserver computer and merged with navigation acquired from the ship's Magnavox MX GPS system via RS-232, logged at 2 minute intervals. The merged navigation and bathymetry file provides a time series of underway potition, course, speed and bathymetry data. These data were used for all station positions, PDR depths, and for bathymetry on vertical sections.