Question 749Navigation General

The correct answer is B) Relative track information. To determine if a close quarters situation will develop with a target vessel, the key data to use from ARPA (Automatic Radar Plotting Aid) is the relative track information. This includes the target vessel's course, speed, and bearing relative to your own vessel. By analyzing this data, you can project the target's future movements and determine if your vessels are on a collision course. The initial range of acquisition (A), predicted time of CPA (C), and set and drift of the current (D) are also useful ARPA data, but they are not as directly relevant to assessing the development of a close quarters situation as the relative track information.