What RHOTHETA Elektronik does

RHOTHETA Elektronik GmbH is a privately held German manufacturer founded in 1989 and headquartered in Murnau am Staffelsee, Bavaria, with a wholly-owned US subsidiary in Plantation, Florida. The company specializes exclusively in Doppler-based radio direction finding (DF) systems operating across the 118-470 MHz VHF/UHF spectrum, including the full COSPAS/SARSAT emergency frequency range. Its product portfolio comprises nine direction finder models (RT-202 Crewfinder, RT-300, RT-400, RT-500-M, RT-600, RT-600 Light, RT-800, RT-1000, RT-1000 MC) spanning maritime SAR, airborne SAR, air traffic control (ATC), vessel traffic service (VTS), and mobile land applications, complemented by an emergency receiver (RT-100 / CrewGuard), a personal locator beacon (RT-B77 HELB), and DF Commander MK2 software for network integration. Core technical differentiation rests on a patented compact wideband antenna (Patent DE 4421759 C1) and three decades of accumulated Doppler DF expertise.

Name

RHOTHETA Elektronik

Legal name

RHOTHETA Elektronik GmbH

Website

https://rhotheta.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

51–100 employees

Short description

RHOTHETA Elektronik GmbH, founded 1989 in Bavaria, Germany, designs and manufactures Doppler-based radio direction finding systems for maritime and airborne search and rescue, air traffic control, vessel traffic service, and ground SAR applications, serving coast guards, rescue organizations, and air navigation authorities worldwide.

Ownership category

akta.pro rank

Product category

Search and Rescue Radio Direction Finding Systems

NAICS

Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing (334511), Aerospace Product and Parts Manufacturing (33641)

SIC

Search, Detection, Navagation, Guidance, Aeronautical Sys (3812), Aircraft Parts & Auxiliary Equipment, Nec (3728)

akta.pro primary industry

Marine Navigation Systems (ECDIS, Radar, GNSS, AIS) (IMAJAJAE)

akta.pro secondary industry

Fleet, Asset Tracking & Telematics Location Platforms (BPAMANAF)

Keywords

• Radio direction finding
• Search and rescue equipment
• Maritime navigation systems
• Air traffic control systems
• Vessel traffic services

Headquarters

HQ city

Murnau

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Personnel, Operations, Supply Chain, Marketing or Sales

Revenue model

1. Direction Finder Hardware Sales: Primary revenue stream from the sale of professional radio direction finder systems including the RT-1000, RT-1000 MC, RT-800, RT-600, RT-600 Light, RT-500-M, RT-400, RT-300, and RT-202. Hardware is sold directly and through a global dealer network to institutional buyers including coast guards, SAR organizations, air traffic control authorities, and commercial maritime operators. Standard delivery time is approximately 6-8 weeks. For customer-specific productions and orders exceeding EUR 100,000, a 30% deposit is required upon order confirmation.
2. DF Software Sales (DF Commander MK2): Sale of DF Commander MK2 software for remote control, monitoring, and integration of direction finding systems into ATC and VTS network architectures. Software enables triangulation, bearing data processing, ASTERIX format conversion, and integration with electronic maps. Sold as an add-on to hardware systems.
3. Emergency Receiver and PLB Sales: Sale of RT-100 Emergency Receivers (marketed as CrewGuard) monitoring the international emergency frequency 121.500 MHz, and RT-B77 HELB Personal Locator Beacons for man overboard emergencies.
4. Accessories and Spare Parts: Sales of accessories including antenna masts, PTT modules, AIS filters, UPS units, audio modules, lightning protection, frequency extension options, and RAMP testers for system maintenance and upgrades.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels4 records

Core offering

RHOTHETA Elektronik designs, develops, and manufactures professional Doppler-based radio direction finder systems for air traffic control, vessel traffic service, and search and rescue applications across maritime, airborne, and land-based environments. The company sells nine direction finder hardware models covering VHF/UHF frequency bands including COSPAS/SARSAT emergency channels, complemented by personal locator beacons, emergency receivers, and DF Commander MK2 integration software, all sold directly and through a global dealer network.

Product overview

RHOTHETA Elektronik specializes in professional radio direction finding systems based on the Doppler principle. The product portfolio centers on nine direction finder models (RT-202, RT-300, RT-400, RT-500-M, RT-600, RT-600 Light, RT-800, RT-1000, RT-1000 MC) serving maritime, airborne, ATC, VTS, and mobile land applications. These are complemented by two complementary devices: the RT-100 emergency receiver and RT-B77 HELB personal locator beacon. The DF Commander MK2 software provides network integration and control across the direction finder range, enabling triangulation and ATC/VTS system integration. Products are differentiated by frequency coverage (VHF air band, marine band, UHF), portability (fixed station, vehicle-mounted, man-pack), and specialization (SAR, coast surveillance, multichannel tracking).

Differentiator

Problem solved

Functional benefit

Products and services

• RT-202 Crewfinder MOB (Man Over Board) direction finder system that monitors emergency frequency 121.500 MHz, triggers alarms, and determines direction of transmitter. Features second operating frequency 121.650 MHz for training and testing. Designed for maritime rescue vessels operating in high sea states.
• RT-300 All-purpose dual-band direction finder system operating on VHF marine and aviation bands. Features SAR direction finding, communication direction finding, and navigation aid with automatic monitoring of 121.500 MHz emergency frequency.
• RT-400

Quantifiable outcome

• RT-400 halves search time for crashed aircraft compared to previous devices, as reported by DGAC for Paris-Charles De Gaulle airport operations.
• +3 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

Feature7 records

Partnerships

13 partnerships are on record, tiered core, major and minor.

• L3 HarriscoreOEM/ Whitelabel/ Licensing Partner · 1 January 2019RHOTHETA supplies RT-500-M radio direction finders to prime contractor L3 Harris since 2019. The equipment is integrated into shipboard mission systems on the United States Coast Guard's new Sentinel-class Fast Response Cutters. This is a significant government defense contract integration.
• Canadian Coast GuardcoreStrategic or Co-development Partner · 1 January 2019In 2019, the Canadian Coast Guard awarded a contract through dealer Seacoast Marine Electronics for fleet-wide replacement of aging direction finders with RT-500-M systems. This represents a major national coast guard adoption of RHOTHETA technology.
• LeonardomajorTechnology or Integration · 1 January 2017RT-1000 MC VDF system delivered to Leonardo for the ATC project in Dakar, Senegal in 2016, successfully completed in January 2017 with acceptance of Leonardo's installation by the end customer.
• Seacoast Marine ElectronicsmajorChannel Partner/ Reseller/ Distributor · 1 January 2015Authorized RHOTHETA dealer headquartered in Halifax, Nova Scotia. Awarded contract in 2019 by Canadian Coast Guard to replace aging direction finders across the entire fleet with RT-500-M radio direction finders within 2-3 years.
• Deutsche Gesellschaft zur Rettung Schiffbruchiger (DGzRS)coreStrategic or Co-development Partner · 1 January 2005Germany's leading SAR organization has partnered with RHOTHETA since 1996, first selecting the RT-200 CrewFinder for its fleet and later providing precise specification requirements and prototype testing for the RT-500-M on its rescue cruisers. This close cooperation resulted in the RT-500-M entering full-scale production in early 2005. RHOTHETA DF systems have been contributing to rescues on German coasts for over 30 years.
• Civil Air Patrol (CAP)majorStrategic or Co-development Partner · 1 January 2000Since 2000, RHOTHETA Elektronik GmbH has supplied RT-600 A Direction Finder Systems to the US Civil Air Patrol, which is responsible for SAR overland throughout the United States, contributing to rescue operations and civil protection.
• Becker Flugfunkwerk GmbHcoreChannel Partner/ Reseller/ Distributor · 1 January 1996Becker Flugfunkwerk GmbH has been a key marketing partner since the early 1990s. They successfully marketed the RT-1000 and later the RT-600, which Becker marketed as SAR-DF 517. Becker contributed decades of experience in airborne communications to the success of the RT-600 system, with several hundred systems deployed.
• Rohde & SchwarzcoreChannel Partner/ Reseller/ Distributor · 1 January 1994Since 1994, Rohde & Schwarz markets the RT-1000 direction finder system under the designation PA030 as part of their product portfolio. This partnership extends distribution reach into the broader aerospace and defense market. Over 150 RT-1000 systems have been deployed worldwide, many through this channel.
• DaniamantminorChannel Partner/ Reseller/ DistributorAuthorized dealer based in Denmark serving the Danish maritime market.
• HENSOLDT AGminorChannel Partner/ Reseller/ DistributorAuthorized dealer based in Germany serving the German defense and security market.
• RTsys Monitoring Solutions (via neotek-web.com)minorChannel Partner/ Reseller/ DistributorAuthorized dealer based in France serving the French maritime and defense markets.
• Radio HollandminorChannel Partner/ Reseller/ DistributorAuthorized dealer based in Norway serving the Norwegian maritime market.
• RHOTHETA InternationalmajorChannel Partner/ Reseller/ DistributorRHOTHETA's own US subsidiary located in Fort Lauderdale/Plantation, Florida, serving the North American market including direct customer relationships with US Coast Guard.

Scale indicators7 records

Recent moves10 records

Expansion highlights6 records

Broad incumbents

• Kongsberg Maritime: Norwegian maritime electronics and VTS provider whose coastal surveillance and ship-tracking solutions overlap with RHOTHETA's VTS DF offerings; serves overlapping port, coast-guard and navy customers with broader systems integration.
• Thales: French defense and ATC electronics prime that supplies VDF and DF subsystems to civil aviation authorities and armed forces worldwide, overlapping with RHOTHETA's ATC/SAR/maritime DF footprint but as part of a much broader portfolio.
• Hensoldt: German sensor specialist (and authorized RHOTHETA dealer) whose portfolio covers naval, air, and land surveillance sensors including DF components; serves the same defense and coast-guard buyer base at a much larger scale and broader scope.
• Saab: Swedish defense and air-traffic-management prime offering naval, airborne and ground DF and SAR solutions such as those deployed with Nordic SAR customers; overlaps with RHOTHETA in coast-guard and military SAR markets.
• L3Harris: US defense prime integrating RHOTHETA's RT-500-M into the US Coast Guard Sentinel-class cutters since 2019; an integrator-customer that also supplies its own maritime DF and electronic warfare suites at much larger scale.
• Leonardo: Italian defense and ATC prime that integrated RHOTHETA's RT-1000 MC VDF for the 2017 Dakar ATC project; competes with full-stack ATC and naval electronics suites that include direction-finding subsystems.
• Indra: Spanish IT and ATC systems house that supplies civil and military air-traffic-control infrastructure across Europe and Latin America; competes indirectly with RHOTHETA's RT-1000/RT-1000 MC VDF solutions as a broader ATC prime.

Direct peers

• Rohde & Schwarz: German test-and-measurement and ATC systems house that both partners with RHOTHETA (resells the RT-1000 as PA030 since 1994) and directly competes as a manufacturer of VDF and ATC direction-finding equipment for civil aviation and defense customers globally.
• Becker Flugfunkwerk GmbH: German airborne communications specialist that co-markets RHOTHETA's RT-600 as SAR-DF 517 while also supplying its own avionics and SAR DF equipment to rotorcraft and fixed-wing operators; a direct competitor and channel partner for airborne direction finding.
• Plath GmbH: Hamburg-based specialist in high-frequency direction finders and signal-intelligence antennas used by navies and coast guards; offers directly comparable Doppler and wideband DF hardware for maritime and signals-intelligence applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/rhotheta-elektronik-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about RHOTHETA Elektronik