Question

the graphics here show ray’s navigational chart above his radar display. which of the following are reasons that ray should use lateral reading across both the chart and radar? (select all that apply.) a) the chart and radar show exactly the same data. b) the radar shows moving objects above the water and the chart does not. c) the chart shows the stump fields under water and the radar does not. d) the chart and radar show completely different data.

Explanation:

To determine the correct options, we analyze each:

• Option A: If they showed the same data, lateral reading wouldn't be needed, so A is incorrect.
• Option B: Radar can detect moving objects (like other vessels) that a static chart might not, so comparing both helps, making B a valid reason.
• Option C: A chart might show underwater obstructions (stump fields) that radar (which detects above - water or surface - level objects more effectively) might miss, so comparing both is useful, making C a valid reason.
• Option D: If they showed completely different data, lateral reading across them wouldn't be useful as they wouldn't be related to the same navigational context, so D is incorrect.

Answer:

B. The radar shows moving objects above the water and the chart does not, C. The chart shows the stump fields under water and the radar does not