Instrument: TRACOR Acoustic Profiling System

The TRACOR Acoustic Profiling System (TAPS) is custom designed zooplankton sampler developed by V. Holliday of Tracor Inc. It uses a four transducer array operating at frequencies 265 kHz, 420 kHz, 1.1 MHz, and 3 MHz. The transducer array is designed to provide information on the distribution of individual organisms ranging in size from individual copepods to nauplii at distances of 2-3 m.