Tuning: IS Feature serves to minimize interference with what?

• A. Minimizes interference with shared band usage or near vicinity usage by another vessel
• B. Increases radar range
• C. Increases transmission power
• D. Reduces radar sensitivity

Answer: (A)

The tuning of the IS feature is all about preventing mutual interference in a crowded radar environment. When multiple vessels operate radars in the same frequency band or in close proximity, their signals can clash and degrade each other’s performance. The IS feature adjusts how the radar transmits—such as choosing stable operating settings or switching to a less congested mode—so its emissions don’t step on another vessel’s signals. This keeps both radars clearer and reduces cross-talk, ghosting, and clutter.

It isn’t about increasing range, boosting power, or sharpening sensitivity. Those changes would affect performance in ways that don’t address the interference issue and could create more problems in a shared-band scenario.