ESM2 CTD (Conductivity, Temperature and Depth) profile data for CEND20_13,
CEND20_14, CEND22_15, CEND22_16, part of the annual autumn pelagic survey in
the English Channel, Celtic Sea and Bristol Channel running from 2012-2016.
ESM2 is a Cefas developed micro logger for applications requiring a small low
power logger with integrated sensors and battery. It has standard sensors for
conductivity, temperature, depth, optical backscatter and roll and pitch, and
was also fitted with an oxygen optode, sea point fluorometer and light
profiler.