Marine library

Azimuth thrusters are highly adaptable propulsion units capable of delivering thrust in any direction, based on operator or system commands. In Dynamic Positioning (DP) operations, these thrusters are indispensable for maintaining vessel stability and maneuverability in complex offshore environments.

Azimuth Barring, also known as the "Prohibited Azimuth Zone", is a critical function in Dynamic Positioning (DP) systems that ensures the safe and efficient operation of azimuth thrusters. This functionality prevents thrusters from adopting a configuration where their exhaust water streams interfere with other thrusters or operational equipment.

Auto Position is the primary operational mode of a Dynamic Positioning (DP) system, enabling a vessel to maintain its position and heading automatically. This function is fundamental for station-keeping in offshore and maritime operations, ensuring stability and precision even in the presence of environmental forces such as wind, waves, and currents.

The Auto Heading Select function is a critical feature in Dynamic Positioning (DP) systems that determines the most efficient heading for a vessel. Often referred to as "Weathervane," "Minimum Power Heading," or "Optimum Heading," this functionality ensures the vessel remains positioned with minimal energy expenditure while maintaining stability.

In marine operations, the use of controllable-pitch (c.p.) propellers offers significant advantages in maneuverability and power control. However, during astern operation, these propellers face notable efficiency limitations.

In Dynamic Positioning (DP) operations, Artemis is a specialized position reference system that employs microwave technology to provide precise range and bearing data. This system consists of two key components: a shore-based transceiver and a shipboard transceiver, working in tandem to maintain accurate positional information.

In the realm of Dynamic Positioning (DP) systems, Age of Data (AoD) is a critical term that refers to the latency of corrections within the Differential Global Positioning System (DGPS). AoD is a measure of how current and relevant the data is for maintaining precise vessel positioning.

This Glossary is a reference to the terms that may have been used in the examination system. The intention of this document is to align Training Centres and guide them to use the same definitions that may be used in the online examination system.

Fast crew supplier, Platform supply vessel, Anchor Handling Tug Supply, Light Construction Vessel and other vessel types are present here.