A CTD is a fundamental piece of equipment used to obtain water column environmental data for physical oceanographic research and modeling. The compact system onboard the R/V Apalachee consists of three main components.
- An electrohydraulic winch (Model DT205 DT Marine Products Inc.) with a 3-hp electric motor and level wind equipped with 1000 m of 0.322” coaxial cable.
- CTD datalogger (Seabird SBE 19 V2 plus) with sensors for measuring conductivity, temperature, and depth (with seven auxiliary ports for additional sensors).
- SBE 32 compact carousel (Seabird Electronics Inc.) equipped with twelve 5-liter Niskin water sampling bottles and a SBE 33 deck unit that provides power and real-time control to the water sampler and the CTD instrument.
CTD data are displayed in real-time and logged to the instrument internal memory for later recovery. The deck box controllers allow for manual or on-command closure of Niskin bottles to take water samples at specific depths.
Figure 1. Winch (L) carousel with water sampling bottles (C) and datalogger (R).
The Seamor 300T ROV is a powerful, industrial inspection-class mini-ROV designed for a wide range of underwater applications, including exploration of benthic habitats and their associated communities, surveying complex ecosystems, as well as high-resolution imagery and videography. Features of the Seamor 300T ROV include:
- High definition forward viewing camera with pan and tilt function; rear view camera for tether observation; easy deployment & recovery; two-function manipulator claw; adjustable auxiliary LED lighting; Leak detectors that give operators advanced warning of a problem
- Manual wind reel with a 300-m fiber optic cable for onboard tether management; integrated controller with LCD monitor and digital video recorder
Figure 2. Controller and video monitor (L), power deck (C), and Remotely Operated Vehicle (ROV)