noun - A scout boat is an additional escort boat that is positioned ahead of a marathon swimmer or channel swimmer to explore and evaluate an area in order to obtain information on currents, eddies, tides, water temperature, marine life, and other conditions that may positively or negatively affect the swimmer. A scout boat often works in coordination with the Mother ship and other escort boats, and can also be utilized in competitive swimming events for safety purposes.
The scout boat was positioned at least 500 meters ahead of the lead pack.
Scout - Middle English, from Anglo-French escuter to listen, from Latin auscultare. First Known Use: 14th century