Page 15: of Marine Technology Magazine (January 2023)

an important role in an integrated underwater distant early volume of acoustic intelligence (ACINT) generated by DAS warning and defense system, providing ISR or relaying tar- will also be daunting.” geting data to interceptor vehicles. The NTNU project, for example, generated some seven tera-

While DAS shows great promise for defense applications, bytes of data per day – or nearly 250 terabytes over the course it does have limitations – at least for now. Its effective range, of the study. Nevertheless, even with these challenges, DAS for example, is roughly 50 to 100 kilometers due to the at- has the potential to greatly in? uence subsea defense. With a tenuation of the re? ected light during its two-way travel, so low-cost, low-maintenance, ready-made sensor network al- a truly large scale DAS array would require some kind of ready in place throughout the world’s oceans, DAS will likely ampli? cation. An integrated DAS defense network would en- soon ? nd its way into the defense inventories of friends and tail comparing sound samples against a database of known adversaries alike.

acoustic signatures in order to identify threats, and to dis- criminate between legitimate targets and false alarms. Thus, Source † Railey, K; DiBiaso, D; Schmidt, H. An acoustic remote sensing a high volume of current and timely measurement and signals method for high-precision propeller rotation and speed estimation intelligence (MASINT) will be required for DAS to assist in of unmanned underwater vehicles, The Journal of the Acoustical detecting and identifying emerging subsea threats. “And in

Society of America. 2020, 148, 3942.

addition to the quantity of MASINT data required, the sheer

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