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Underway data are continuous data collected while transiting between stations on CalCOFI cruises. Data collection usually continues while on station so there may be a few to several hours of data in a limited area. Processed underway data are 10 minute average, CTD or bottle sample corrected data. Different vessels such as NOAA RV Bell M Shimada may have significantly more underway data collected than RV Ocean Starr. NOAA vessel data are typically collected using the SCS shipboard computer system and in a variety of formats and frequencies. SIO vessel data are typically collected using the MET shipboard meterological system which combines multiple sensor measurements into a 30 second comma-delimited record.

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