Explanation: The claim that AIS SART signals can be detected "much farther away" than radar-based SART signals is not an advantage, and in many practical scenarios, it may not be true. 1. **AIS SART (Option A):** AIS SARTs operate on VHF frequencies (161.975 MHz and 162.025 MHz). Like all VHF transmissions, their effective detection range is primarily limited by the radio horizon (line-of-sight propagation). While they transmit a precise GPS position, their *detection range* itself is not inherently greater than a radar SART, and in some cases, a powerful X-band radar could detect a radar SART further out than a standard AIS receiver could reliably pick up an AIS SART signal due to varying propagation characteristics and receiver sensitivities. Therefore, this is not an advantage. 2. **Accuracy and Robustness (Options B, C, D):** * **B) Not every AIS transmission needs to be received:** AIS SARTs transmit bursts of data containing their GPS position multiple times per minute. If one burst is missed due to interference, subsequent transmissions will likely be received, still providing an accurate and up-to-date location. This provides redundancy and robustness, making it an advantage. * **C) GPS accuracy:** AIS SARTs incorporate a GPS receiver, transmitting their own precise, absolute position data. Radar SARTs, in contrast, rely on the search vessel's radar to determine a relative bearing and range, offering no inherent position data from the SART itself. This is a significant advantage for pinpointing a rescue location. * **D) Poor radar conditions:** AIS SARTs transmit digital data that is processed by an AIS receiver. This digital display is generally less susceptible to environmental factors like heavy rain, sea clutter, or a crowded radar screen that can obscure a radar SART's signal, making them easier to find in challenging conditions. This is an advantage.