Short pulse size is typically used for:

• A. Open sea long-range surveillance.
• B. Weather monitoring.
• C. High-altitude tracking.
• D. Navigation and close range.

Answer: (D)

Short pulse size gives finer range resolution, which means the radar can distinguish two targets that are very close to each other in distance from the radar. For navigation and close-range operations, you need to clearly separate nearby hazards, traffic, channel markers, and shorelines. With a short pulse, echoes from these close targets don’t blur together, so you can identify and track them accurately at popular near-range distances. The trade-off is that shorter pulses carry less energy per pulse, slightly reducing maximum detection range, but that’s acceptable when the primary need is resolving nearby objects rather than spotting far-away targets.