Which term refers to the combination used to predict wheelover motion?

• A. Advance and transfer
• B. Parallel index
• C. SART signature
• D. LOP intersection

Answer: (A)

When predicting how a vessel will move during a turn, you look at how far it travels in two directions as the wheelover occurs. The key idea is that the turning path can be described by two distances: how far the ship covers along its original course before the turn takes it onto the new line (the initial advance), and how far it travels along the new course after that point until the turn settles onto the new direction (the transfer). Knowing both distances lets you forecast the bow’s position throughout the wheelover and determine whether there’s enough space to complete the maneuver safely. Other terms refer to different concepts: a parallel index is a reference line used for radar plotting, SART signature relates to identifying distress transmissions, and a line-of-position intersection is a method for fixing position, not for predicting turning paths.