Feeds

Raytheon to deliver 'paging system' for submarines

Seagoing lone wolves finally get BlackBerry treatment

The next step in data security

US arms behemoth Raytheon has won a $5.2m contract to deliver its Deep Siren "tactical paging system" for submarines to the US navy.

Submarines, being underwater, are often hard to get in touch with. The only kind of radio which works at all is very-long-wavelength, which can be used to contact subs trailing special antennae provided they aren't too deep. This solution has sharply limited bandwidth and only works shore-to-ship. The only other option, historically, has been for the sub to come to persicope depth and put up a comms mast.

All this has meant that submarine captains were only in touch with higher authority at predetermined times, when they would slow down, come shallow and stream longwave receiving antennae - or put up masts - according to previous orders. If the sub was running fast and/or deep, tough. There was often no way to contact it. The submarine skipper remains one of the last of the truly independent decision-makers, living a blissful life out of touch with his bosses sometimes for weeks on end.

That was OK for the Cold War, when most of the subs' business involved independent, strictly maritime missions. Nowadays, however, the underwater warships need to get involved in modern combined operations, for which their new bosses would like to be able to reach them more easily - just like the hapless modern wage slave with his BlackBerry.

Hence Deep Siren, which is a fairly basic idea. A surface or air boss wishing to get in touch with a sub drops a small disposable buoy into the sea somewhere within a few tens of miles of the sub's location. The buoy has Iridium satcomms, allowing it to connect to the US military's Global Information Grid comms infrastructure.

From the buoy, the signal is passed on via an acoustic signal which can be picked up by the sub up to 50 miles away. The system is one-way, hence "paging system". The acoustic signal is unavoidably low-bandwidth, but then so is Iridium.

Each buoy can last for three days, including up to 30 minutes of acoustic transmissions, according to the Raytheon data sheet.

Raytheon got the job of developing Deep Siren back in 2005, and this latest contract is for delivery.

"Submarine communication protocols are much the same as they were 60 years ago," said Raytheon's Jerry Powlen.

"Integrating satellite communications with acoustic Deep Siren technology dramatically changes this paradigm by enabling a commander anywhere in the world to contact a submarine immediately regardless of the submarine's speed or depth."

In fact, the one-way nature of the link, the usually uncertain location of a submerged boat, and the unpredictability of marine acoustics would suggest that the kit may not be 100 per cent reliable. The Raytheon spec claims only "a high confidence of communicating reliably to a submerged submarine".

In many ways, you might say that the limited nature of Deep Siren indicates just how bad the existing options for communicating with submarines were. That said, Deep Siren is supposed to be just the first generation of a lot of new kit which will finally, properly bring the lone-wolf submarine captains under the heel of shore HQ like everyone else. ®

Choosing a cloud hosting partner with confidence

More from The Register

next story
SCREW YOU, Russia! NASA lobs $6.8bn at Boeing AND SpaceX to run space station taxis
Musk charging nearly half as much as Boeing for crew trips
Boffins say they've got Lithium batteries the wrong way around
Surprises at the nano-scale mean our ideas about how they charge could be all wrong
Thought that last dinosaur was BIG? This one's bloody ENORMOUS
Weighed several adult elephants, contend boffins
Edge Research Lab to tackle chilly LOHAN's final test flight
Our US allies to probe potential Vulture 2 servo freeze
Europe prepares to INVADE comet: Rosetta landing site chosen
No word yet on whether backup site is labelled 'K'
India's MOM Mars mission makes final course correction
Mangalyaan probe will feel the burn of orbital insertion on September 24th
Cracked it - Vulture 2 power podule fires servos for 4 HOURS
Pixhawk avionics juice issue sorted, onwards to Spaceport America
City hidden beneath England's Stonehenge had HUMAN ABATTOIR. And a pub
Boozed-up ancients drank beer before tearing corpses apart
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.