In navigation, what is ADVANCE?

The term "ADVANCE" in navigation specifically refers to the distance gained in the direction of the original course after a vessel has turned. This is a crucial concept when understanding maneuvering and the effectiveness of turns. When a vessel alters its heading, the advance helps in determining how much forward progress has been made along the original path, offering insight into the vessel's new position relative to previous navigational points.

Understanding this concept is essential for safe navigation, especially near hazards or in confined waters, as it helps mariners anticipate the vessel’s new trajectory and adjust their navigation plans accordingly. The role of advance in planning and executing a turn cannot be overstated, as it impacts not only the vessel's immediate safety but also the efficiency of the navigation.

In contrast, the other options do not align with the definition of advance in navigation. The total time for the voyage, the distance traveled while going astern, and the angle of deviation from the course pertain to different aspects of navigation and vessel maneuvering but do not encapsulate the meaning of advance.