Loss of distant targets during and...

🔍 Key Concepts

• How radar signal attenuation is affected by moisture on external components versus atmospheric conditions • The role of the waveguide and rotary joint in carrying transmitted power from the radar to the antenna • Difference between short‑term effects of a passing rain shower and more persistent internal transmitter issues

💭 Think About

• Ask yourself: if the targets are lost only during and right after wet weather, which part of the radar system is most likely to be affected directly by rain or spray? • Consider whether high atmospheric absorption or humidity would selectively affect only distant targets or both near and far targets. • Think about which choice describes something that would change quickly with weather versus something that would be a long‑term or gradual problem.

✅ Before You Answer

• Which option involves a component that is exposed on deck and can be directly affected by rain and water ingress? • Which options would more likely cause overall performance degradation, not just loss of distant targets? • Which condition could produce a temporary mismatch or loss that improves again when things dry out?

Loss of distant targets during and immediately after wet weather indicates:

A leak in waveguide or rotary joint.

High atmospheric absorption.

Dirt or soot on the rotary joint.

High humidity in the transmitter causing power supply loading.

🔍 Key Concepts

💭 Think About

✅ Before You Answer