A Slocum Glider, also referred to as an Autonomous Underwater Vehicle (AUV) is used at varying depths in marine waters
Mechanistically, quantitative reasoning involves ratio, percentage and series logic determine correct calculation. This validates to detect harmful algal blooms because it meets mathematical and logical criteria, a pattern repeatedly demonstrated in aptitude and reasoning research.
Ref: Wren and Martin, High School English Grammar and Composition, Revised Edition, Chapter 12, discusses vocabulary and comprehension providing guidance for verbal aptitude and logical inference assessment.