Secure Optical Mobile Local Communication Systems for Royal Navy Frigates

Manufacturer of optical, RF and microwave products Link Microtek, has successfully delivered the first three ship-sets of its Azdec secure optical MLC (mobile local communications) systems for installation on to the Royal Navy’s Type 26 frigates.

The Azdec optical MLC system provides naval personnel with totally secure, interference-free voice communications while allowing them to roam away from their base positions, unhindered by any trailing wires. There are no RF emissions, and the optical signals cannot be intercepted by any conventional method, so it is impossible for anyone to jam the transmissions or eavesdrop on what is being said.

Each vessel will be equipped with two separate 8-channel Azdec systems, comprising a total of:
• 2 base stations
• 31 fixed infrared antennas,
• 16 binaural headsets
• 32 operators’ belt-mounted battery- pack/control units
• 4 battery-charging units

One system will cater for the bridge and bridge wings while the other one serves the operations room; both will be integrated into the ship’s main communications system.

The optical digital encoding technology at the heart of the Azdec system is completely immune to radio, radar, and electrical noise even severe energy pulses and has no effect on sensitive electronic equipment. Furthermore, the Type 26 system is compatible with the use of night vision goggles and fully satisfies the MoD’s TEMPEST requirements. It also carries a Class 1 product designation as defined by the EN 60825-1 standard, which means it presents no ocular or other health hazard to users.

“Our Azdec optical communications technology is already in operation on a variety of Royal Navy vessels, such as Type 45 destroyers and Type 23 frigates, and we are delighted to deliver the first part of this latest order as part of the Type 26 integrated communications programme.

“It further demonstrates the suitability of the Azdec system for shipborne MLC applications where the highest levels of security and wire-free ease of mobility are the main requirements.” Commented Link Microtek’s Managing Director Steve Cranstone

This supply completes the systems for installation on HMS Glasgow, HMS Belfast and HMS Cardiff, together with smaller-scale versions for the land-based integration facility that is being used to test and verify the functionality of the entire Type 26 communications system.

Rohde & Schwarz is responsible for the supply and integration of all communications systems on board the new Type 26 vessels, which are due to enter service from the mid- 2020s, having been selected for this task by prime contractor BAE Systems.