Feeds

Raytheon to deliver 'paging system' for submarines

Seagoing lone wolves finally get BlackBerry treatment

The Power of One Infographic

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. ®

Eight steps to building an HP BladeSystem

More from The Register

next story
Malaysian Airlines flight MH17 claimed lives of HIV/AIDS cure scientists
Researchers, advocates, health workers among those on shot-down plane
Forty-five years ago: FOOTPRINTS FOUND ON MOON
NASA won't be back any time soon, sadly
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
Mwa-ha-ha-ha! Eccentric billionaire Musk gets his PRIVATE SPACEPORT
In the Lone Star State, perhaps appropriately enough
MARS NEEDS OCEANS to support life - and so do exoplanets
Just being in the Goldilocks zone doesn't mean there'll be anyone to eat the porridge
Diary note: Pluto's close-up is a year from … now!
New Horizons is less than a year from the dwarf planet
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
prev story

Whitepapers

Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.