August 29, 2018 | International, C4ISR
By: Kelsey Atherton
The ocean hides what it contains, and it is in that hiding that submarines have their power. Lurking under seas, at first with just enough capability for an attack run and now with the ability to lurk for months at a time, submarines remain power out of reach, unseen until engaged in combat or resupplying in a friendly port. That stealth comes at a cost, however, besides the simple perils of existing underwater.
When submerged, submarines are more or less on their own until they resurface again, since radio waves do not travel well through seawater. Or they are for now. New research by MIT, presented at a conference in late August, devised a way for submerged submarines to communicate wirelessly with people on the surface by combining hydroacoustics and acoustic radars.
Presently, submarines communicate either across normal radio frequencies when surfaced or through hydroacoustic signals and listening posts underwater that can transmit the messages back to counterparts on shore. Very and extremely low-frequency radio waves can be transmitted in a way that submarines can listen to below the surface, but it's a one-way form of communication, from stations on land to submarines. To get something responsive, with the flexibility to communicate away from static seabed hydrophones, needs something else.
Specifically, it needs a way to combine hydroacoustic transmission from the submarine through water that can then be converted into a useful data.
“We present a new communication technology, translational acoustic-RF communication (TARF),” write paper authors Francesco Tonolini and Fadel Adib of the MIT Media Lab.
“TARF enables underwater nodes to directly communicate with airborne nodes by transmitting standard acoustic signals. TARF exploits the fact that underwater acoustic signals travel as pressure waves, and that these waves cause displacements of the water surface when they impinge on the water-air boundary. To decode the transmitted signals, TARF leverages an airborne radar which measures and decodes these surface displacements.”
In testing, they demonstrated that the communication technique can transfer data at standard underwater bitrates up to 400bps, and even do so with surface waves 6.3 inches crest-to-crest, or 100,000 times larger than the surface perturbations made by the acoustic transmitter.
Right now, this communication is one-way. While the signal transmitted up from the water produces useful information at the boundary with the air, a signal transmitted through the air downwards would disintegrate on integration with water. This one-way is distinct from previous forms of communication with submarines, however, as it lets the submarine talk without revealing its position to surface sensors.
Despite the limitations, and the earlierness of the research, Tonolini and Adlib see a bright future for the technology, as a way to enable a host of new technology in machines. The technology, they write, can enable “many applications including submarine-to-drone communication, deep-sea exploration, and subsea IoT (Internet of Things).
https://www.c4isrnet.com/c2-comms/2018/08/28/mit-discovers-way-for-submarines-to-talk-to-drones
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April 20, 2018 | International, Naval
By: Mark Pomerleau With a relative dearth of cyber expertise in the military, Congress mandated last year the services begin direct commissioning pilot programs. The Navy, however has been doing direct commissioning for highly skilled software engineers for a few years, albeit on a small scale. The cyber warfare engineer (CWE) program is a highly competitive program with officers on five year rotations performing software or tool development for cyber operators. CWEs serve as members of the cyber mission force, the Navy's cyber mission force teams that serve as the cyber warriors for U.S. Cyber Command, producing cyber tools, but can also conduct target analysis, vulnerability research, and counter-measure development against malicious cyber activities. Since 2011, the Navy has only recruited 25 of these commissioned officers to its ranks. “Twenty-five developers in the Navy as military officers is definitely not enough,” Lt. Christopher Liu, the most senior cyber warfare engineer told Fifth Domain in an interview at the Navy League's Sea Air Space conference April 9. With a relative dearth of cyber expertise in the military, Congress mandated last year the services begin direct commissioning pilot programs. The Navy, however has been doing direct commissioning for highly skilled software engineers for a few years, albeit on a small scale. The cyber warfare engineer (CWE) program is a highly competitive program with officers on five year rotations performing software or tool development for cyber operators. CWEs serve as members of the cyber mission force, the Navy's cyber mission force teams that serve as the cyber warriors for U.S. Cyber Command, producing cyber tools, but can also conduct target analysis, vulnerability research, and counter-measure development against malicious cyber activities. Since 2011, the Navy has only recruited 25 of these commissioned officers to its ranks. “Twenty-five developers in the Navy as military officers is definitely not enough,” Lt. Christopher Liu, the most senior cyber warfare engineer told Fifth Domain in an interview at the Navy League's Sea Air Space conference April 9. “We definitely need to increase the billets and increase the amount that we can hire ... to have more talents to be able to work on the cyber mission,” he said. “As soon as the number increases, we'll be able to expand the program rather than just five years to eight years, hopefully make it into a 20 year career so people can get trained up and work on missions and not be forced into different fields.” The Pentagon has been besieged by concerns about the DoD's ability to both retain and attract cyber talent among its ranks when similar jobs in the private sector pay significantly more. Vice Adm. Michael Gilday, commander of 10th Fleet/Fleet Cyber Command, acknowledged in recent congressional testimony that the military is not competitive with the private sector and noted that the base pay for the CWE position is around $37,000 a year. “That's what we pay somebody to answer the phones around here,” Senator Claire McCaskill, responded to Gilday interrupting him in frustration. “We're asking them to have incredible expertise. That seems to me totally unrealistic.” Some current CWEs feel the work they're doing inside the Navy has greater meaning than similar work they did in the private sector. “I find that this is a lot more fulfilling,” Ensign Jordan Acedera, the most junior CWE told Fifth Domain. “You finish a project, you're given something that's a lot more challenging and that really tests you.” For Lt. (j.g.) George John, who was formerly writing software at a stock trading company, work with the CWE provides a better environment that's not driven so much by profit margins and hitting quarterly revenue targets. “We don't have to worry about profitability or bringing to market,” he said. “We can pursue a little more ... what's possible. Throw stuff against the wall, see what sticks, take our time to figure out a plan of action.” One of the biggest challenges, however, is lack of knowledge of the program, even inside the Navy. “You still walk across captains and commander who say 'CWE, what in god's name is that,” John said. With more CWE personnel in the force, the Navy could build a more informed and skilled software engineering cadre, the group said. “There's tons of software. Everybody has some type of software pet project,” John said. “To be able to get more CWEs on those things and coordinate with one another and say here's what [Consolidated Afloat Networks and Enterprise Services] is doing with their communications and their infrastructure. How are we doing that differently on the base side? You can talk and address security concerns with one another. Just within the cyber operations realm, Liu said, as the headcount increases, the CWEs could work on the requirements the operational community within the cyber mission force rather than having to prioritize projects. They could even start to look at developing capability prior to a specific requirement coming in as a means of staying ahead of the game as opposed to waiting for and reacting on requirements from operators. https://www.defensenews.com/digital-show-dailies/navy-league/2018/04/11/why-the-navy-wants-more-of-these-hard-to-find-software-developers/