...IGNORANCE killed the "CAT" once again...! Submarine communications are limited...!!!

IGNORANCE KILLED THE "CAT"...!
IGNORANCE still fuels ADULT Human's World, Science and News...!
BLUEFIN 21 is not as marvellous as you may think...!
Journalists are telling us "KIDS STORIES"...!
Governments and the NAVY are also telling us "KIDS STORIES"...!

http://www.ctvnews.ca/world/malaysia-plane-update-bluefin-21-sub-to-attempt-deep-sonar-search-for-pings-1.1765641
http://news.yahoo.com/mh370-sub-launch-several-days-away-signals-sought-035211991.html
http://www.phnx-international.com/auv-equipment.html
http://www.phnx-international.com/specs/AUV_Bluefin21_Specsheet.pdf
http://en.wikipedia.org/wiki/Nuclear_submarine

http://www.naval-technology.com/features/featuredeep-secret-secure-submarine-communication-on-a-quantum-level/
http://en.wikipedia.org/wiki/Communication_with_submarines

[[["...
Malaysia plane update: Bluefin 21 sub to attempt deep sonar search for pings.

The Bluefin 21, Artemis autonomous underwater vehicle (AUV) is hoisted back on board the Australian Defense Vessel Ocean Shield on April 1 after successful buoyancy testing in the Indian Ocean, as search efforts continue for missing Malaysia Airlines Flight 370. (AP Photo/U.S. Navy, Specialist 1st Class Peter D. Blair)

 PERTH, Australia -- Search crews were for the first time sending a sub deep into the Indian Ocean to try and determine whether faint sounds detected by equipment on board an Australian ship are from the missing Malaysia Airlines plane's black boxes, Australia's acting prime minister said Tuesday.

Warren Truss, Australia's acting prime minister while Tony Abbott is overseas, said the crew on board the Ocean Shield will launch the underwater vehicle, the Bluefin 21 autonomous sub, on Tuesday. The unmanned miniature sub can create a sonar map of the area to chart any debris on the sea floor. If it maps out a debris field, the crew will replace the sonar system with a camera unit to photograph any wreckage.
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[[["...
Navigation------------:
Inertial Navigation System Kearfott Custom KN-6053
ADCP/Doppler Velocity Log Teledyne RDI Workhorse Navigator 300 kHz
Ring Laser Gyro Kearfott T24Monolithic RLG
Acoustic Positioning System Lodestar GyroUSBL [8084]
Depth Sensor Paroscientific 8CB7000-I
GPS Thales/Ashtech DG14
Sound Velocity Sensor Valeport Mini SVS
Communications---------------:
Acoustic modem Benthos ATM 885 MF Directional
RDF Beacon Bluefin - RDF
RF Serial Link Freewave FGRMT
Iridium Satellite Modem NAL 9601-D-1
Ethernet Direct Cirexx CPU1232 Ethernet
..."]]]
[[["...
Submarine communication challenges-----------------:

Submarine communication is restricted by the depth at which vessels can exchange information and the speed at which they can do so through the medium of water.

Recently however, researchers have made impressive strides in solving this dilemma using a technique called Quantum Key Distribution (QKD).

QKD promises to guarantee secure communication through the principles of quantum mechanics, without sacrificing speed or forcing the submarine to rise nearer the surface.
"Submarine communication is restricted by the depth at which vessels can exchange information."

For a submarine to retain all its tactical advantage, it must remain submerged in the mixed layer, which is around 60 to 100 metres deep, below which surface sonars cannot detect them. Submarine communications are currently carried out while submerged using ELF or VLF radio waves because only very low or extremely low frequencies can penetrate the water at those depths.

Using ELF and VLF presents a number of disadvantages, however. The transmission sites have to be very large, meaning the submarine must tow cumbersome antenna cables, plus it usually has to align on a specific orientation and reduce speed to obtain optimal reception.

The VLF and ELF frequencies only offer a very low bandwidth: VLF supports a few hundred bits a second while ELF sustains just a few bits each minute. This prevents the transmission of complex data such as video.

One potential solution is to carry out optical communications using a laser, a concept which has been around since the 1980s when experiments were carried out to demonstrate that it is possible to maintain an optical channel between a submarine and an airborne platform.

The Quantum Technologies group at defence technology specialist ITT Exelis is looking at taking this a step further through research into the feasibility of laser optical communication between a submarine and a satellite or an airborne platform, secured by using quantum information.

The work ITT Exelis carries out for the US Government includes research in a wide variety of quantum information topics, including the development of quantum algorithms, quantum sensors and novel solutions for quantum communication systems.
..."]]]
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...as far as i know, you cannot communicate with any kind of radio wave in depths greater than 100-300 feet...!
SO I DO NOT KNOW HOW THIS "UNMANNED" sub, can be autonomous, and run a "pre-programmed deep run, without not running the risk of hitting into a cliff or hill down so deep...!
IT IS NOT ALL A FLAT BOTTOM...!

I DO NOT KNOW OR ANY WAY OR FORM OF ACOUSTIC "REMOTE CONTROL SYSTEM"...!!!

ALL NUCLEAR NAVY SUBMARINES, HAVE TO SURFACE TO A FEW HUNDRED FEET, AND DEPLOY A FLOATING ANTENNA, TO TRY AND REMAIN "HIDDEN"...!
THE HEAT INFRA-RED SATELLITE IMAGE IS BELIEVED TO BE QUITE OBSERVABLE...!

The depth penetration of IRIDIUM satellite waves into the Ocean is not more...!

THIS sub BLUEFIN 21 is as blind as a bat or worse, after a few 100 feet of Ocean water...!

Sorry folks, but Ocean search is more than a "needle in a hay stack" when the HAY STACK IS SO BIG AS THE Indian Ocean, and SO DEEP...!
THE PACIFIC OCEAN is Worse...!

UNLESS a Miracle occurs, and much more equipment is used, it will be more than 10years before anything truly is found...! Like a body and/or bones of a passenger, or other things...!

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