If an underwater submarine passes beneath a plane in the sky, there’s been no way for them to communicate with each other without having the submarine surface (or float a buoy), jeopardizing its location to an adversary.
Fadel Adib and Francesco Tonolini of MIT Media Lab, have developed a way to connect these seemingly dissonant mediums through something called Translational Acoustic-RF communication, or TARF. Using sound waves from underwater, and Radar from the air, messages can be transmitted by creating faint ripples on the surface of the water.
Below we see an “Artist Conception of the Short Takeoff and Vertical Landing (STOVL) fighter concept, developed by the David W. Taylor Naval Ship and Research and Development Center, in various stages of flight and recovery positions near the 325-foot small waterplane area twin hull ship (SWATH),” received February 1981.
Interestingly enough, DARPA has been working on a tail-sitter for the past several years, known as the Tern project.
And it could wind up being the Marines’ new MUX drone, meant to be a poor man’s E2 Hawkeye/EF-18G Growler for use from LPDs and LHA/Ds.
More on that at The Drive
Well, this will help curb the great pilot shortage.
“The Autonomous Aerial Cargo/Utility System (AACUS) program successfully completed a final helicopter flight demonstration with autonomous capability at Marine Corps Base Quantico, Va. The 2017 Robert J. Collier Trophy nominee, AACUS is a partnership between the Office of Naval Research (ONR) and technology company Aurora Flight Sciences that will enable the Marine Corps to rapidly resupply forces on the front lines using cutting-edge technology sponsored by ONR.”
I give you, DARPA’s robot subchaser, Sea Hunter, testbed of the ACTUV program, which is now part of ONR.
DARPA has successfully completed its Anti-Submarine Warfare (ASW) Continuous Trail Unmanned Vessel (ACTUV) program and has officially transferred the technology demonstration vessel, christened Sea Hunter, to the Office of Naval Research (ONR). ONR will continue developing the revolutionary prototype vehicle—the first of what could ultimately become an entirely new class of ocean-going vessel able to traverse thousands of kilometers over the open seas for month at a time, without a single crew member aboard—as the Medium Displacement Unmanned Surface Vehicle (MDUSV).
The handover marks the culmination of three years of collaboration between DARPA and ONR that started in September 2014. An April 2016 christening ceremony marked the vessel’s formal transition from a DARPA-led design and construction project to a new stage of open-water testing conducted jointly with ONR. That same month, the vessel moved to San Diego, Calif., for open-water testing.
ONR plans to continue the aggressive schedule of at-sea tests to further develop ACTUV/MDUSV technologies, including automation of payload and sensor data processing, rapid development of new mission-specific autonomous behaviors, and exploring coordination of autonomous activities among multiple USVs. Pending the results of those tests, the MDUSV program could transition to U.S. Navy operations by 2018.
The Naval Research Laboratory has been testing a light rotary drone called the Nomad from USS Coronado (LCS-4). The cool thing about it is that it is CO2 launched from a tube, and they can carry (and operate) multiple Nomads at once.
According to NRL:
The Nomad is a highly affordable expendable design, allowing for execution of its mission without concerns for returning to the ship. This new upgrade retains the original affordable expendable design, but now has a recovery feature that allows operators to retrieve and reuse the Nomad vehicles multiple times in support of development, testing, training, and potentially future operational missions.
A kinda interesting concept, especially if you allow the tech to grow to where a single LCS could serve as a “drone carrier” flying dozens or even possibly hundreds of small tube-launched Nomads or weaponized successors operating in swarms. Now that actually sounds like a useful littoral combat ship.
Over the past few years DARPA has been working on their version of the old U-Boat kite.
ICYMI, during WWII, the Kriegsmarine’s U-boat fleet used about 200~ Focke-Achgelis FA 330 Bachstelze (English: Wagtail) aircraft. The FA330 was a type of rotary-wing kite that weighed about 150-pounds and, using an unpowered 24-foot three-bladed rotor for lift, was winched out into the air behind a U-boat on a 500-foot cable, allowing the adventuresome sailor in its single seat to have the best view on the boote.
A simple idea, they were complicated in use as they took a long time (20-30 minutes to assemble) and, if the kiteman saw an enemy warship, slowed the dive of the submarine far too long than was safe.
Well, the ONR and DARPA have teamed up to do the same thing but in an updated (and unmanned) version that swaps out the rotating kite wing for a much safer parafoil.
Observe the Towed Airborne Lift of Naval Systems (TALONS) below, a low-cost, elevated sensor mast being tested out on USS Zephyr, a 179-foot Cyclone-class patrol coastal. It is the first time it was used aboard a U.S. Navy vessel, after being trialed on Sea Hunter, DARPA’s ACTUV vessel last year.
“Towed behind boats or ships, TALONS could persistently carry intelligence, surveillance, reconnaissance (ISR), and communications payloads of up to 150 pounds between 500 and 1,500 feet in altitude—many times higher than current ships’ masts—and greatly extend the equipment’s range and effectiveness.”