"SART" redirects here. For other uses, see Sart (disambiguation).
A search and rescue transponder (SART) is a self-contained, waterproof transponder intended for emergency use at sea. These devices may be either a radar-SART, or a GPS-based AIS-SART (automatic identification system SART).
The radar-SART is used to locate a survival craft or distressed vessel by creating a series of dots on a rescuing ship's radar display. A SART will only respond to a 9 GHz X-band (3 cm wavelength) radar. It will not be seen on S-band (10 cm) or other radar. Shipboard Global Maritime Distress Safety System (GMDSS) include one or more search and rescue locating devices.
The radar-SART may be triggered by any X-band radar within a range of approximately 8 nautical miles (15 kilometers). Each radar pulse received causes the SART to transmit a response which is swept repetitively across the complete radar frequency band. When interrogated, it first sweeps rapidly (0.4 microsecond) through the band before beginning a relatively slow sweep (7.5 microseconds) through the band back to the starting frequency. This process is repeated for a total of twelve complete cycles. At some point in each sweep, the radar-SART frequency will match that of the interrogating radar and be within the passband of the radar receiver. If the radar-SART is within range, the frequency match during each of the 12 slow sweeps will produce a response on the radar display, thus a line of 12 dots equally spaced by about 0.64 nautical mile (1,185 km) will be shown. When the range to the radar-SART is reduced to about 1 nautical mile (1,852 km), the radar display may show also the 12 responses generated during the fast sweeps. These additional dot responses, which also are equally spaced by 0.64 nautical mile (1.2 km), will be interspersed with the original line of 12 dots. They will appear stronger and larger the closer the interrogating radar gets, slowly becoming arcs at first until the SART is within 1NM, the arcs will become full circles indicating the active SART is in the general area.
SARTs are typically cylindrical, about the size of a person's forearm, and brightly coloured.
and 23 Related for: Search and rescue transponder information
A searchandrescuetransponder (SART) is a self-contained, waterproof transponder intended for emergency use at sea. These devices may be either a radar-SART...
include one (two on vessels over 500 GT) search-and-rescue locating device called SearchandRescue Radar Transponders (SART) which are used to locate survival...
Emergency position-indicating radiobeacon station (EPIRB) Search andrescuetransponder (SART) Survival radio Emergency Centre of Activity (ECOA) frequencies...
distress can be signaled using automated radio signals such as a SearchandRescueTransponder (SART) which response to 9 GHz radar signal, or an Emergency...
transceiver with DSC and GNSS 9 Devices using a free-form number identity: SearchandRescueTransponders (970yyzzzz) Man overboard DSC and/or AIS devices (972yyzzzz)...
station Radiocommunication service Searchandrescuetransponder Ramark ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.103, definition:...
associated with rescue, and may be a necessary part of a rescue. Equipment used might include searchandrescue dogs, mounted searchandrescue horses, helicopters...
Survival radios are carried by pilots andsearchandrescue teams to facilitate rescue in an emergency. They are generally designed to transmit on international...
satellites also incorporate transponder(s) for receiving distress alert signals for searchandrescue missions in the South Asian and Indian Ocean Region, as...
NAVTEX Emergency Position Indicating Radio Beacons (EPIRBs) SearchandRescueTransponders (SARTs) Candidates are then examined face to face on the above...
Positioning (B2b - GEO sats), andsearchandrescuetransponder (6 MEOSAR) capabilities. Characteristics of the "I" signals on E2 and E5B are generally similar...
coordinate searchandrescue efforts. Search efforts began in the Gulf of Thailand and the South China Sea. On the second day of the search, Malaysian...
and RescueTransponders that integrated geosynchronous communications for use by the military and the private sector to track aircraft, ships, and other...
This list covers most artificial satellites built in and operated by the Republic of India. India has been successfully launching satellites of various...
the divers can search while towed at the surface. Divers can use sonar units. They use be active sonar (transponders that emit a signal and measure the return...
primarily to the military and to OEMs in industrial markets for use in radios, emergency radio beacons, searchandrescuetransponders, pipeline inspection...
satellite Emergency Position Indicating Radio Beacons (EPIRBs) and SearchandRescueTransponders (SARTs). Chapter V – Safety of navigation This chapter requires...
is used by professional rescue teams on avalanche site, by foot or from a helicopter. The reflector is a passive transponder, which does not require batteries...