Shelby launches an expendable bathythermograph (XBT), which measures the temperature of the water column down to 760 meters. Temperature and salinity measurements are used to calculate the water column sound velocity for more accurate mapping operations.
Shelby Launching an XBT
Image courtesy of Exploring Carolina Canyons expedition. Download larger version (jpg, 4 MB).

Shelby launches an expendable bathythermograph (XBT), which measures the temperature of the water column down to 760 meters. Temperature and salinity measurements are used to calculate the water column sound velocity for more accurate mapping operations.

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