MOB Direction Finder System

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 shown on an LED dot display.

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.

Applications

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 smaller vessels and rescue craft as well as for rescue missions on land

Special Features

• 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 (IP 67) and robust 
• Extremely compact design 
• Portable model also available 
• RS-232 interface for remote control capability 

• Commercial vessels
• Yachts 
• Offshore

The RT-300 is an all-purpose direction finder system that is designed for operation on two different frequency bands depending on the application. The RT-300 sets new benchmarks in terms of precision and reception sensitivity. Special algorithms permit fast, stable display of information.

Applications

The RT-300 VS is the standard model and combines the functionality of a communication direction finder system for the VHF marine band with the functions of an MOB direction finder . The RT-300 VU VHF/UHF is an SAR direction finder for civilian and military applications. 

The RT-300 direction finder system is designed for mobile use at sea or on land under extremely adverse conditions and is equally suitable for shore-based VTS facilities. The RT-300 not only sets new benchmarks in terms of performance but also features various functions that in the past could be obtained only by using various direction finder systems. 

The flexible system configuration makes it possible to support many different applications.

Features

• Universal dual-band direction finder system for the VHF marine and aviation bands and the VHF/UHF aviation bands 
• SAR direction finder, communication direction finder and navigation aid 
• Automatic monitoring of emergency frequency 121.500 MHz during work on marine radio band 
• Unsurpassed reception sensitivity in this class to permit detection of extremely weak or distant signals 
• Selective squelch to avoid false alarms 
• Display of bearing with reference direction as true north, magnetic north or relative 
• Completely illuminated control unit 
• Optimized signal processing for fast, stable direction finding 
• Excellent localization precision 
• NMEA, RS-485 and RS-232 interfaces for system integration and remote control capability 
• Correction of lag error after changes in direction 
• Optimized for use at sea: robust, compact design, waterproof (IP 67) display/control unit and antenna

The RT-500-M is a multi-band direction finder system that operates on all frequency bands used for rescue missions. This direction finder automatically monitors the emergency frequencies 121.500 MHz, 243.000 MHz and 406.028 MHz (Cospas-Sarsat) as well as channel 16 of the marine band. The bright TFT display permits a clear overview of all direction finder information and operating parameters. A convenient menu structure makes it possible to adapt the RT-500-M direction finder system to the needs of the user. Various interfaces (LAN, NMEA RS-422, RS-232) facilitate integration of the direction finder system in legacy or planned system environments.

Applications

The RT-500-M direction finder system fully meets the steadily increasing needs of modern civilian and military search-and-rescue organizations. Emergency beacons that operate on the 406.028 MHz Cospas-Sarsat frequency can be reliably identified and localized. Like all RHOTHETA direction finder systems, the RT-500-M features complete MOB functionality to ensure the safety of SAR crew members. That makes the RT-500-M direction finder system a complete solution for professional SAR organizations. 

Although the RT-500-M was optimized for use in high sea states, this direction finder system is also suitable for stationary VTS applications. 

Applications

• Commercial vessels
• SAR Sea
• Offshore 
• Ground SAR 
• Tower Costal Surveillance 

Special Features

• Universal multi-band direction finder: VHF aviation and marine band, UHF aviation band, Cospas-Sarsat frequency 
• Automatic monitoring of emergency frequencies during work on other frequency bands 
• High reception sensitivity to permit detection of extremely weak or distant signals 
• High direction finder accuracy, precise and stable display 
• LAN, NMEA, RS-422 and RS-232 interfaces for system integration and remote control 
• Optimized for use at sea: robust construction, waterproof (IP 67) display/control unit and antenna 
• Compact broadband antenna system (Patent DE 4421759 C1)
• Graphic TFT color display, especially bright (450 cd/m 2 ) 
• Remote control unit for exterior control platform with full control and display functionality
• Complete illumination with automatic dimming as a function of ambient light conditions

The RT-600 (SAR-DF 517) is an SAR direction finder system for airborne SAR that operates on all frequency bands used for rescue missions, including emergency frequencies 121.500 MHz, 243.000 MHz and 406.028 MHz (Cospas-Sarsat) as well as channel 16 of the marine band. 

Emergency beacons that operate on the Cospas-Sarsat frequency 406.028 MHz can be identified and localized. No additional equipment is required in the aircraft since the electronic direction finding components are integrated into the a ntenna. 

The display and control unit consists of an 80-mm round instrument, and the g raphic LCD display permits convenient viewing of localization and Cospas-Sarsat information.

Application This high-precision SAR direction finder system was designed specifically for use on board all aircraft, including helicopters

Special Features

• Universal SAR direction finder: VHF aviation and marine band, UHF aviation band, Cospas-Sarsat frequency 
• High reception sensitivity to permit detection of extremely weak or distant signals 
• High direction finder accuracy, precise and stable display 
• Optimized for use on board aircraft: compact display and control unit with LCD display.

RT-1000 Direction Finder System for ATC and VTS Applications

The RT-1000, which has become the benchmark in its class, is also marketed by Rohde & Schwarz under the designation PA030 . More than 100 systems are currently in use worldwide.

Application
The RT-1000 is used as an ATC navigation aid that allows controllers on the ground to transmit QDMs to the pilot or verify position reports received from aircraft. Bearing information can also be integrated into a radar screen, which makes it possible to immediately assign radio messages to the right targets on the radar display. 

The RT-1000 is also suitable for stationary VTS applications. 

Areas of Application 

• Air traffic control (ATC) 
• Commercial vessels (VTS)

Special Features

• High-precision Doppler direction finder
• Extremely high rotation frequency for fast signal processing 
• Compact antenna system for simple installation 
• Antenna location independent of controller workstation 
• No infrastructure required for remote operation 
• Maintenance-friendly modular construction 
• RS-232 interface to permit system integration 
• Frequency range: 
• Aviation band: 118.000 ... 136.975 MHz 
• Marine band: 156.000 ... 174.000 MHz 
• Various scanning modes 
• Two or more simultaneous channels optionally available