🔍 Key Concepts

• Different types of RADAR interference (e.g., sea clutter, rain clutter, electrical noise, jamming) • Which types are most commonly encountered in normal commercial shipboard operations • How RADAR display typically looks in bad weather versus in heavy seas

💭 Think About

• Think about what you actually see most often on a RADAR screen underway in typical conditions: which two types of clutter appear again and again? • Which interference types require deliberate hostile action, and which occur naturally all the time? • Of the listed interferences, which pair would a deck watch officer most frequently adjust gain/sea/rain clutter controls to reduce?

✅ Before You Answer

• Identify which options are both natural and frequent under normal operating conditions • Separate environmental/clutter effects from man‑made or equipment-based noise • Ask: which pair would most commonly require routine adjustment of sea clutter and rain (weather) clutter controls on a standard marine RADAR?