Page 11: of Marine Technology Magazine (May/Jun 2026)

to make it more dif? cult to be tracked, a highly suspect activity for an oceano- graphic research vessel

China’s expansive and growing ? eet of research and survey vessels, operated under the guise of government agen- cies, universities, and civilian research

A hydrographic survey ship operated by the Royal Australian Navy. © Adobe Stock/Ryan institutes, is also capable of generating environmental intelligence of direct rel- evance to PLAN operations. While sur- vey operations are largely concentrated in the South China Sea and Western Pa- ci? c, China has been extending its reach with surveys of the Indian Ocean as

Ç??˪¯©©¯ª¯ªª?Ç?¯ª well as the Arctic, where the U.S. Coast

Guard routinely monitors vessels op- erating within the U.S. Extended Con- tinental Shelf (ECS). Chinese oceano- graphic vessels often deploy numerous underwater gliders and pro? ling ? oats, providing a near real-time operating picture of the underwater environment, and enabling PLAN submarines to oper- ate covertly in the waters of neighboring states, many of whom are in increasing- ly acquiring their own submarine ? eets to secure their maritime interests. Like

Yantar, Chinese vessels also periodi- cally go dark, or sometimes deliberately spoof their positions to conceal opera- tions, particularly when operating in the waters surrounding Taiwan where de- tailed seabed imagery could inform sub- marine, amphibious assault, and mine warfare operations, as well as identify the locations of subsea cables that could be targeted during con? ict.

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As the undersea domain becomes in- creasingly operationalized and contest-

WRXJKMREVDURXQGWKHZRUOG4XDOLW\DQGUHOLDELOLW\DUH ed, hydrographic survey will become

GHVLJQHGDQGPDQXIDFWXUHGLQWRHYHU\FDEOHZHEXLOG more tightly and critically woven into subsea defense, and oceanographic research vessels, both crewed and un- crewed, will likely ? nd themselves in- creasingly on the front line of national ìCôðìcñðôCíìóî security and geopolitical stability. In an

Ár¤?ÁJÁ¯ËÇ?~rÛr~¤?ö¯© era of gray zone operations, proliferat-

Á¯ËÇ?~rÛr~¤?ö¯© ing autonomous systems, and intensify-

H½¯Ë?YO7rªËrÇ˽?½O?ª?ìôðò ing great-power maritime competition, oceanographic data is not only scienti? c information—it is environmental intel- ligence that is fundamental to subsea &'"&2i8"'8K YOU=72&'"&2i8"'8KYOU=72 navigation, undersea warfare, seabed operations, and strategic deterrence. www.marinetechnologynews.com 11

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