GMDSS FCC Element 7 Practice Test 2026 – Full Exam Prep Guide

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What radar display changes indicate the correct approach to a SART?

The line of dots indicate the SART's position, the dots become increasing arcs as the distance to the SART lessens, rescuing vessels should increase speed to reach Distress more quickly.

A line of dots on a radar screen rotates to indicate the SART's position along its line of bearing; rescuing vessels should steer for the center of the line of dots.

The line of dots indicate the SART's position, the dots become increasing arcs as the distance to the SART lessens, rescuing vessels should reduce speed as the arcs get greater in degree.

The correct answer accurately reflects how a Search and Rescue Transponder (SART) appears on a radar display and what the information signifies for a rescuing vessel. When a SART is activated, it transmits a signal that appears as a series of dots on a radar screen that indicates its position. As a rescue vessel approaches the SART, the dots start to form increasing arcs, which visually represents that the rescuing vessel is closing the distance to the SART.

In this context, reducing speed as the arcs get greater in degree is an essential aspect of safe navigation. As a vessel approaches a distress situation, it is crucial to slow down to maintain control and ensure safety for both the rescuing crew and those in distress. This reduced speed allows for a careful assessment of the situation and helps to avoid collisions or accidents, particularly in potentially hazardous or crowded water conditions.

The other answer choices do not accurately describe the display behavior or the appropriate action for the rescuing vessels. The confusion around the details in the other options can lead to misunderstandings about radar operation and safe rescue procedures, which emphasizes the correctness of the right interpretation provided in the choice discussed.

The line of dots indicate the SART's position, the dots become decreasing arcs as the distance to the SART lessens, rescuing vessels should reduce speed as the arcs lessen in degree.