General Dynamics Mission Systems has been contracted to deliver high-frequency (HF) communications for the US Navy's four-channel, AN/USC-61(C) digital modular radios (DMR).

Under the contract, the company will provide 3G HF third generation automatic link establishment (ALE) for the DMRs.

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The ALE is said to increase transmission rates from radio to radio by 24%, while reducing static and other noises.

"This improved HF capability gives sailors and their commanders a communications advantage."

It also improves communications among US and coalition forces and can boost satellite communications (SATCOM) when SATCOM networks are overloaded or unavailable, the company said in a statement.

General Dynamics Mission Systems vice-president Paul Parent said: “This improved HF capability gives sailors and their commanders a communications advantage with improved communications reliability and higher data capacity, particularly when beyond line of sight networks are unavailable.

“DMR also provides a more effective alternative to satellite communications in locations where satellite connectivity or capacity is limited or unavailable.”

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General Dynamics’ software-defined DMR radios are the navy’s mission critical communications hub for navy vessels and submarines.

These radios provide military voice and data communication channels, including ultra-high frequency satellite networks, very high frequency and line of sight radios, single-channel ground and airborne radio systems (SINCGARS), and other tactical radios.

The radios featuring General Dynamics advanced infosec machine (AIM) encryption chip also communicate simultaneously at multiple levels of security, on each of the radios four channels.

In order to improve the navy’s beyond line of site voice and data communications, Mobile User Objective System waveform was recently added to DMR.