Search And Rescue Transponder (SART)

The RESCUER 2 SART is a 9GHz X-band Radar transponder and has been designed for assisting air/sea ship or survival craft rescue operations in accordance with IMO, SOLAS requirements.

The RESCUER 2 has been designed for reliable operation in the toughest of marine environments, in accordance with IMO/GMDSS requirements.

Once activate, when a radar signal is received from a ship or aircraft, the RESCUER 2 automatically transmits a response signal, which clearly identifies the survival craft on the radar screen by means of a stream of 12 in-line dots. When in use the RESCUER 2 will remain in standby mode for over 96 hours and automatically start transmitting in response to a radar transmission being received.

• FCC approved.
• For ship or survival craft.
• Buoyant and Waterproof to 10mtrs.
• Compact and lightweight.
• Replaceable, 5 year battery life.
• Audio/visual indication of operation.
• Built-in test facility.
• Integral lanyard.
• Mounting options – internal/external.

Technical description

A single switched antenna is used for both receive and transmit functions; the switch normally connects the antenna to the receiver circuit. In the standby state only the receiver portion of the SART is powered to reduce battery consumption to a minimum. In this condition the indicator circuit causes the LED to flash once every two seconds.

On receipt of a radar pulse the video amplifier and detector circuit causes the rest of the circuitry to become active and the unit switches to transmit mode. In this condition the indicator circuit causes the LED to remain steady and the buzzer to sound every two seconds.

The detection of a radar pulse causes the switch to connect the antenna to the transmitter circuit. The output stage is fed by a Voltage Controlled Oscillator (VCO), whose frequency is determined by a sweep generator. When triggered by the detector the sweep generator turns on the VCO and causes it to produce exactly 12 forward and reverse frequency sweeps before shutting down again.

If no radar pulses are detected for a period of 15 seconds the unit reverts to standby mode.

Technical Specifications

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