The CTD data is time and geo-stamped and stored in the vehicle log for post processing acoustic data.  The CT readings, along with depth from the Iver's onboard pressurer sensor, are also pushed in real time to the onboard devices such as the DVL and Multibeam sonar to create a sound velocity profile for improved data accuracy.

The CTD sensor design includes a 4 electrode conductivity cell, and a pressure thermistor.  The sensor outputs data as Temperature and Conductivity. A "fin" style, internal field conductivity cell with integral pressure protected thermistor is embedded in an exterior hull mounted sensor on the Iver AUV.

Specifications for Neil Brown CTD Sensor for Iver2 AUV:

	Range	Accuracy	RMS Noise
Conductivity	0 to 9 S/m	0.0001 S/m	0.00002 S/m
Temperature	-5 to 45 C	0.0005 C	0.0003 C

The Iver CTD option permits free flushing, low drag, low thermal mass and low fouling potential with a confined field and rugged contruction.  A rapid response thermistor is mounted in the the conductivity cell, so that accurate salinity computations can be made.