While the vessel is docked the presentation...

Question 1 / 27070pAMRbEQHocOyqUCwdI8W

Question 1 of 27070pAMRbEQHocOyqUCwdI8W

While the vessel is docked the presentation of the pier is distorted near the center of the PPI with the pier appearing to bend in a concave fashion. This is a primary indication of what?

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Question 1 of 27070

While the vessel is docked the presentation of the pier is distorted near the center of the PPI with the pier appearing to bend in a concave fashion. This is a primary indication of what?

🔍 Key Concepts

• How a radar PPI (Plan Position Indicator) displays fixed objects like piers when everything is correctly adjusted • What kind of error causes bending or curvature of straight targets toward or away from the center of the screen • Which radar components affect linearity and timing of the sweep versus which affect power or brightness

💭 Think About

• Ask yourself: a straight pier should appear as a straight line on the PPI. If it looks bowed or concave, what part of the radar system controls how range cells line up radially from the center? • Consider which component would affect the geometry of the display (how things line up in range) versus components that mainly affect overall position, alignment, or brightness. • Think about which choice deals with timing or delay of the radar sweep, and which choices deal more with centering, magnetic fields around the CRT, or filament condition.

✅ Before You Answer

• Identify which option is responsible for range sweep timing/linearity, not just image centering or brightness. • Eliminate any answer focused mainly on centering the trace or magnetic alignment of the entire picture rather than bending of a straight pier image. • Verify which component, if misadjusted, would cause mid-range targets to be displaced relative to near and far ranges, making a straight object appear curved.

Question 1 of 27070

While the vessel is docked the presentation of the pier is distorted near the center of the PPI with the pier appearing to bend in a concave fashion. This is a primary indication of what?

The deflection coils need adjusting.

The centering magnets at the CRT neck need adjusting.

The waveguide compensation delay line needs adjusting.

The CRT filaments are weakening.

Question 1 / 27070pAMRbEQHocOyqUCwdI8W

Question 1 of 27070pAMRbEQHocOyqUCwdI8W

While the vessel is docked the presentation of the pier is distorted near the center of the PPI with the pier appearing to bend in a concave fashion. This is a primary indication of what?

Back

Question 1 of 27070

While the vessel is docked the presentation of the pier is distorted near the center of the PPI with the pier appearing to bend in a concave fashion. This is a primary indication of what?