Question 1

Radar measures most precisely…

Accepted Answer

Range — It is a stopwatch: echo time converts to range with great accuracy. Bearing is smeared by the beamwidth — trust radar ranges, treat radar bearings as approximate.

Question 2

The poorest radar targets among these are…

Accepted Answer

Wooden and GRP small craft — Small non-metallic craft return weak echoes and drown in sea clutter — exactly why your own boat carries a reflector and still assumes she is unseen.

Question 3

Over-suppressing the sea-clutter control risks…

Accepted Answer

Erasing the small close-range targets along with the waves — Clutter and small boats live in the same part of the picture. Tune until speckle JUST shows — a perfectly clean screen has been cleaned of targets.

Question 4

Head-up versus north-up display: head-up shows…

Accepted Answer

Your heading at the top — intuitive for collision work, but the picture swings with every course change — Head-up matches the view through the windscreen; north-up matches the chart and holds steady while you turn. Know which your set is in before you trust a bearing.

What the beam actually sees

This lesson is part of a paid course