How can vessel personnel detect the operation of a SART in its vicinity?

The detection of a Search and Rescue Transmitter (SART) is accomplished through a unique signal that the device emits, which is specifically designed for locating distressed vessels or individuals in the water. When activated, a SART transmits a continuous signal that consists of a 12-dot pattern. This signal radiates outward in accordance with the directional line of bearing from the SART's position and is typically at a frequency designed for radar systems.

The distinctive 12-dot pattern creates a mark on the radar display which can be identified by vessel personnel as an indication of the SART's operation in the vicinity. This pattern allows rescuers to distinguish the SART signal from background noise and other radar targets, making it a crucial tool during search and rescue operations.

While there are other methods for detecting SART signals, such as through VHF-FM channels or AIS, these mechanisms do not utilize a radar-based signal like the dash-dot pattern. In certain conditions, SART signals may also create radar targets that fluctuate or disappear, but this does not represent a reliable detection method. The emphasis on the specific 12-dot signal pattern underscores the unique operational purpose of SART devices in maritime safety.