The RHOTHETA RT-600 A, also known as the STANDARD version, stands as a testament to advanced radio direction finding technology crafted for airborne applications. Primarily designed for search and rescue missions, this system offers expansive coverage of emergency signals across various frequencies. From VHF to UHF, marine channel 16, and every COSPAS/SARSAT channel, the RT-600 A ensures no distress call goes unnoticed.

Distinguished by its precision and efficiency, the device capitalizes on its patented wideband antenna and revolutionary bearing analysis algorithms. This combination delivers quick, steady, and reliable information to the user. For a more in-depth perspective, consider the Direction Finder (DF) mode. Here, depending on the type of signal received, operators can view a gamut of information, ranging from basic bearings from analog sweep-tones to intricate details from digital signals such as COSPAS-SARSAT. The unit further impresses with its ability to scan the entire COSPAS-SARSAT sub-band in less than 400 milliseconds, ensuring the detection of a signal within a single COSPAS-SARSAT repetition cycle.

Durability is another hallmark of the RT-600 A. Designed explicitly for the rigors of airborne operations, it can withstand harsh conditions, making it a reliable companion for any search and rescue mission. With its compact design, it remains suitable for both manned and unmanned aircraft, ensuring adaptability across a range of aerial platforms.

The RT-500, sometimes referred to as "BECKER SAR DF-517", Direction Finding System is a state-of-the-art solution that fulfills all current SAR requirements and is designed to meet future demands until 2010. It consistently exceeds customer expectations for acquisition and range capabilities, accurately capturing transmitting SAR beacons over distances of more than 100 km at an altitude of 10,000 feet. The system has been successfully demonstrated using frequencies such as 121.5MHz, 156.8MHz, 243MHz, and 406MHz, complying with international COSPAS-SARSAT regulations and capturing all emergency frequencies and beacons worldwide. The system consists of a hermetically sealed unit that integrates the receiver and antenna, suitable for installation on helicopters or fixed-wing aircraft.

The system's advanced technology, including the patented antenna concept and sophisticated bearing analyzing algorithms, enables excellent bearing results. It is available in two versions: the standard version for traditional emergency frequencies in the UHF and VHF band, as well as maritime distress calling channel 16 and COSPAS/SARSAT signals, and the Law Enforcement version that includes VHF emergency frequency, COSPAS/SARSAT signals, and additional LE-signals such as LoJack, ETS, and Med-track. 

The RT-500 can effectively detect the 406MHz pulse generated by an emergency beacon, even though the pulse lasts only 450 milliseconds and occurs every 50 seconds, a challenging task for conventional Direction Finder systems. It automatically scans for other emergency frequencies between the 406MHz pulses and can also be used for training purposes at 406.025MHz. The SAR DF-517 has demonstrated its ability to accurately isolate individual beacon transmissions within a small search area, even when multiple beacons are active, such as in the case of multi-crewed aircraft equipped with Locator beacons. It can integrate with BECKER's integrated or mobile moving map displays, providing visual indication of survivors as targets and guiding SAR crews with the necessary track to reach the indicated position.

The BECKER SAR DF-517 Direction Finding System supports the complete COSPAS/SARSAT Frequency range, including future channels, and offers a fast scanning mode for rapid detection of any possible COSPAS/SARSAT frequency within one pulse period (less than 400 ms). Its reliable performance and advanced features make it an ideal choice for professional SAR and Law Enforcement purposes.