Which of the following is considered a disadvantage of radar compared to AIS?

Which of the following is considered a disadvantage of radar compared to AIS?

• A. Requires continuous power supply
• B. Targets can be obscured by clutter
• C. Provides enhanced target range
• D. Transmits data automatically

Answer: (B)

The option indicating that targets can be obscured by clutter is indeed a recognized disadvantage of radar compared to AIS. Radar relies on reflected radio waves to detect objects, and the presence of environmental conditions or surrounding objects can create 'clutter', which may obscure the target information. This clutter can stem from rain, sea surface conditions, or small vessels and floating debris in the vicinity. As a result, radar may struggle to provide a clear picture in high-clutter situations, making it challenging for operators to discern between relevant targets and background noise. In contrast, AIS (Automatic Identification System) relies on broadcasting information from ships, such as their position, course, speed, and more, which is not affected by visual or environmental clutter in the way radar can be. AIS signals are received and displayed by other vessels and shore stations, allowing for improved identification and tracking of vessels without the confusion that can arise from radar clutter. Other options look at aspects like power supply needs or data transmission methods, but they do not specifically address the limitations of radar in visibility and identification compared to the advantages that AIS offers in terms of clarity and reliability.

The option indicating that targets can be obscured by clutter is indeed a recognized disadvantage of radar compared to AIS. Radar relies on reflected radio waves to detect objects, and the presence of environmental conditions or surrounding objects can create 'clutter', which may obscure the target information. This clutter can stem from rain, sea surface conditions, or small vessels and floating debris in the vicinity. As a result, radar may struggle to provide a clear picture in high-clutter situations, making it challenging for operators to discern between relevant targets and background noise.

In contrast, AIS (Automatic Identification System) relies on broadcasting information from ships, such as their position, course, speed, and more, which is not affected by visual or environmental clutter in the way radar can be. AIS signals are received and displayed by other vessels and shore stations, allowing for improved identification and tracking of vessels without the confusion that can arise from radar clutter.

Other options look at aspects like power supply needs or data transmission methods, but they do not specifically address the limitations of radar in visibility and identification compared to the advantages that AIS offers in terms of clarity and reliability.