What is a key feature of navigation radars operating at high frequencies and low pulse lengths?

High frequencies and low pulse lengths in navigation radars are designed to provide high-resolution imagery, which is essential for distinguishing between closely spaced objects in the radar's field of view. This capability is particularly valuable in marine environments where precise navigation and obstacle detection are critical for safety. The short pulse lengths contribute to improved resolution because they allow the radar to better differentiate between signals that are reflected from different objects. However, this high resolution comes at the cost of range; such configurations tend to operate effectively over shorter distances.

In contrast, long-range capabilities typically correlate with lower frequencies and longer pulse lengths, which sacrifice some resolution for the ability to detect objects farther away. Hence, the choice reflecting high resolution and short range accurately encapsulates the performance characteristics of high-frequency, low pulse length radars.