IN Brief:
- The agreement covers Roke’s Nav-Sync miniature radar altimeter for an unnamed major US prime contractor.
- A $16 million first-year production order has been placed, with deliveries starting in October 2026.
- The companies expect at least $170 million of business across five years, with an extension envisaged towards 2035.
Roke has signed a five-year strategic partnering agreement with an unnamed major US prime contractor to supply its Nav-Sync miniature radar altimeter for aerospace and uncrewed platforms. The agreement is expected to generate at least $170 million over its first five years, while a $16 million production order for the initial 12 months has already been received. Deliveries are due to begin during October 2026.
Chemring, Roke’s parent company, announced the agreement on 14 October and said the business relationship could continue until at least 2035. The projected $170 million relates to the first five years, whereas only the initial $16 million production order has been disclosed as placed. The US prime contractor, host platform and quantity of altimeters remain unidentified.
The Nav-Sync product is designed to measure height above the surface using radar rather than relying solely on barometric pressure or satellite-derived position. Radar altimetry provides a direct measurement of the distance to the reflecting terrain or water below an aircraft. That information becomes especially useful during low-level flight, take-off and landing, when relatively small changes in height can affect platform clearance and control.
Roke has designed the miniature radar altimeter around a low size, weight and power requirement. Its integrated antenna removes the need for a larger externally separated antenna assembly and helps the equipment fit into airframes where payload space is limited. The company lists a mass of approximately 375 grams for the product described in its technical case study, together with non-proprietary interfaces intended to simplify integration into different aircraft designs.
In published product information, Roke states that Nav-Sync can provide altitude measurements over a range from 20 centimetres to 100 metres, with a claimed precision of two centimetres. The company also describes operation at horizontal speeds of up to 300 metres per second. These figures are manufacturer specifications for the product family; Chemring has not disclosed the exact configuration, acceptance tolerances or qualification requirements associated with the new US order.
Miniature radar altimeters must combine radio-frequency sensing with sufficient processing speed to provide useful measurements when a vehicle is moving quickly. Roke says its design uses proprietary signal-processing algorithms and dedicated digital hardware to process radar returns over land and sea. The ability to update measurements rapidly is relevant where the surface height changes beneath an aircraft or the vehicle adjusts its flight path at low altitude.
Different reflecting surfaces can change the quality of a radar height measurement. Smooth water, broken terrain, vegetation and other features produce different return characteristics; aircraft attitude and movement introduce further variation. Roke says Nav-Sync is designed to work over land and sea during fast, low-altitude flight, but its published performance figures are product claims rather than the customer’s disclosed acceptance criteria for this contract.
The equipment sits within the aircraft’s navigation and flight-control architecture rather than operating as a complete navigation system on its own. Flight-control software can use a radar-derived height measurement alongside inertial, barometric and other available information, according to the platform design. Successful integration depends on the electrical interface, update rate, data format and how the host system responds if a reading is unavailable or inconsistent.
Roke identifies both fixed-wing and rotary-wing uncrewed aircraft as intended applications. Low-level flight and automated recovery are among the potential uses described in its product literature, including platforms operating above the sea. These examples describe the broader product capability and should not be taken as confirmation that the unnamed US buyer is using Nav-Sync on a particular aircraft or for a specific mission.
Production deliveries will require consistent antenna, electronics and signal-processing performance across successive units. Maintaining a controlled hardware and software configuration is important when an altimeter feeds data to flight-control equipment, because changed output characteristics may affect the host aircraft’s integration and testing. Chemring has not disclosed a production site, output rate or customer-specific qualification schedule for Nav-Sync.
Roke also offers a low-profile Nav-Sync variant for installations where enclosure height is especially restricted. It is designed to retain radar altitude sensing in a thinner package that can be fitted more closely into compact airframes. Chemring has not specified which Nav-Sync configuration the US prime contractor has ordered, so the low-profile option should not be treated as part of the confirmed supply agreement.
The first $16 million production tranche is due to begin shipping in October 2026. Subsequent orders will determine how much of the forecast five-year value becomes committed business, while any continuation towards 2035 remains an expectation. The buyer and aircraft integration programme have not been identified, leaving production deliveries as the first stated milestone against the agreement.
