Like the RT-100 emergency receiver, the RT-202 CrewFinder MOB direction finder system monitors the international emergency frequency 121.500 MHz and triggers an alarm in the event a distress signal is received. At the same time, the direction of the transmitter is determined and indicated by a LED ring.
All of our SAR products feature a selective squelch function that only triggers an alarm if a distress signal is actually identified. This eliminates false alarms due to radio frequency interference or other radio signals. When the selective squelch function is deactivated, any radio signal can be received regardless of its modulation.
The RT-202 also features a second operating frequency (121.650 MHz) for training and testing purposes.
In the event of a man overboard situation, the individual in distress can be found quickly and easily. No matter how adverse the visibility and weather conditions (darkness, fog, precipitation, waves…), the CrewFinder never loses “sight” of the person in the water.
The RT-202 direction finder system is a compact, robust SAR instrument intended for localization of crew members in the water or assistance of crew of neighboring vessels.
For mobile rescue missions at sea or on land:
With its compact antenna, this SAR direction finder is also suitable for installation on board of smaller vessels and rescue craft as well as for rescue missions on land.
- Simple intuitive operation
- Extremely high reception sensitivity to permit detection of extremely weak or distant signals
- Special processing algorithm for signal stable localization
- Selective squelch to avoid false alarms
- Waterproof (IP67) and robust
- Extremely compact design
- Portable model also available
- RS-232 interface for remote control capability
|Method of bearing||Doppler-principle (3 kHz frequency of rotation)|
< 2 µV/m;
< 150 nV at receiver input
|Receiving frequencies||121.500 MHz + 121.650 MHz (custom frequencies on request)|
|Bearable kinds of modulation||A3E, F3E, A2X (ELT-modulation), bearing largely independent of modulation|
|Polarisation error||≤ 5° at 60° field vector rotation|
|Garbling cone||approx. 30° to the vertical|
|Time of response **||≤ 50 ms (with sufficient receiving field strength)|
Downward audio sweep,
frequency range = [300Hz ... 1600Hz],
repetition rate = [250ms ... 500ms], f/100ms = [-140Hz
|Operating voltage||11V.. 28V DC|
|Current consumption||max. 350 mA (without external speaker)|
|Monitoring||with inbuilt miniature speaker; modulation: A3E|
|Seriel RS232 (V24)||1200 Baud; parity = odd; 7 data bit, 1 stop bit|
for external speaker (on GND) app. 5 Vpp on 8 Ohm,
output power app. 0.5 Watt
Open collector output to GND with receiving signal / alarm:
Uout < 1 V DC (Imax: ca. 100mA)
|Temperature range||-20°C ... +60°C|
Display Control Unit: app. 600 g
Antenna: app. 1400 g
Display: ( length x width x height ): 120 mm x 100 mm x 55 mm
Antenna: ( Diameter x height ): 260 mm x 600 mm
|Protective systems||Display Control Unit: IP 67 Antenna: IP 67 ***|
|Later due trust wind||
app. 14 N at 150 km/h wind speed
app. 20 N at 180 km/h wind speed