The SIN computer got stuck in a re-boot cycle every 9 minutes for a couple of weeks during the October 2015 deployment and for every re-boot a new ADCP300 and ADCP600 file was created. The re-boot cycle was longer than 9 minutes so it didn’t make it to the ADCP1200 as many times, thus ADCP 300 and ADCP600 have many many .000 files and the ADCP1200 has multiples but fewer. Fore more information ask Tom O’Riley (MBARI).