Glossary Archive

The Ocean Data Acquisition System (ODAS) is a system used to collect, process, and transmit various types of oceanographic data. This system typically includes a network of sensors, instruments, and data loggers deployed in the ocean to measure parameters such as temperature, salinity, currents, waves, and other environmental conditions. The data collected by the ODAS...

The International Maritime Signal Flag Oscar. Meaning Man overboard. (Often attached to the Danbuoy pole on boats.)The semaphore flag.

The Ocean Data Acquisition System (ODAS) is a system used to collect, process, and transmit various types of oceanographic data. This system typically includes a network of sensors, instruments, and data loggers deployed in the ocean to measure parameters such as temperature, salinity, currents, waves, and other environmental conditions. The data collected by the ODAS...

The designated officer responsible for the safe navigation and operation of a vessel during their assigned watch period.  The Officer of the Watch (OOW) is a key role on a vessel, ensuring the ship's safe passage and adherence to regulations while on duty. The OOW is responsible for maintaining a proper lookout, monitoring navigational equipment,...

The area of the sea that is away from the coast, typically beyond the immediate inshore waters, and often associated with deeper waters and open-sea conditions. In marine terminology, "offshore" is used to describe activities, locations, or conditions that occur or exist away from the shoreline, typically in deeper waters. The term is relative to...

The Offshore Personal Survival course is an intensive program designed for sailors participating in offshore and ocean races. Participants learn life-saving techniques, including life raft drills, survival swimming, and handling emergencies in rough seas. The course also covers equipment checks, distress signaling, and personal preparation for extreme conditions. Recognized by World Sailing, this course is...

Waterproof clothing worn to keep crew dry in wet or rough conditions. This clothing usually includes a jacket and trousers or salopettes designed to resist spray, rain and water running across the deck. Good marine waterproofs allow movement while protecting the wearer from wind chill and prolonged exposure. Features such as high collars, cuffs, reflective...

Flag semaphore indicating the letter O.

International Morse Code sequence representing the letter O.

Refers to the direction towards the land from the sea, often used to describe winds or currents that move from the water towards the coast. In a marine context, "onshore" is primarily used to describe the movement of winds, currents, or waves that flow from the sea towards the land. This term is crucial for...