The 10-cm radar compared to a 3-cm radar of similar specifications will __________.

The correct response indicates that the 10-cm radar will have a wider horizontal beam width compared to the 3-cm radar. A longer wavelength, like that of the 10-cm radar, results in a beam that is less focused, which translates to a wider horizontal beam width. This characteristic is particularly beneficial for certain applications, such as navigating in environments where a broader coverage area is advantageous.

Wider beam widths help in detecting larger objects and can be more effective at providing situational awareness over a broader area, making it easier to spot potential hazards or targets. This feature can be crucial in crowded or complex navigation scenarios, like in harbors or along rivers.

In contrast, the other answers relate to specific performance aspects that are more aligned with the characteristics of the shorter wave radar. The 3-cm radar, with its narrower beam width, would generally offer higher resolution imaging and better discrimination of smaller objects, which might be superior for detecting low-lying targets under favorable conditions. Understanding beam width and the impact of radar wavelength on performance is essential in evaluating the appropriate radar for different navigation scenarios.