What is not an advantage of an AIS SART signal when compared to a radar-based SART signal?

The assertion regarding the advantage of AIS SART signals in terms of detection distance is the focal point of understanding this question. AIS (Automatic Identification System) SART (Search and Rescue Transponder) utilizes VHF radio frequencies and is designed to be received by AIS-equipped vessels and shore stations, leveraging the benefits of GPS for accurate position reporting.

When comparing the AIS SART signal to a radar-based SART signal, the AIS SART does indeed provide certain advantages, such as accurate positioning derived from GPS and the ability to transmit its location regularly on VHF frequencies. Additionally, due to the nature of radio waves and their propagation, AIS can cover a significant distance, making it advantageous in search and rescue operations.

However, the notable limitation of AIS over traditional radar SART signals is that while AIS can provide precise location data, its effective range is influenced by the need for line-of-sight communication and can be impacted by terrain and obstacles, which can limit detection at greater distances as compared to radar. Therefore, asserting that the AIS SART can be detected much farther away than radar models misrepresents the practical application of radar functionality, especially in terms of active scanning capabilities over vast areas. Radars have the potential to detect targets at much farther ranges