SUCA: An Engine for Repetitive Autonomous Profiling Near the Ocean Surface

Craig L Stevens, Peter Hill, Murray J Smith, Stephane Popinet

Limnol. Oceanogr. Methods 3:300-307 (2005) | DOI: 10.4319/lom.2005.3.300

ABSTRACT: The SUCA (SUbmerging Controller Addition) is a robust engine for repeated profiling (yo-yoing) in near-surface waters. It connects to a number of existing oceanic sampling packages and enables many hundreds of profiles to be made over the upper 10 m or so of the ocean or lake in a relatively short period. The workings of the unit are described along with an estimate of power requirements and the wind-limited maximum depth. An advantage of the SUCA is that it enables the entire sampling package to be positively buoyant. The engine has proven to be a simple and robust device that is flexible enough to work with a range of sampling packages in a variety of locations including long-swell Southern Ocean conditions and choppy coastal waters.