Hydrograph and seadar technologies sign agreement to advance subsea radar platforms for port defense and deep-sea resource discovery

Vancouver, british columbia, sept. 24, 2025 (globe newswire) -- hydrograph inc. (cse: hg) (otcqb: hgraf) (“hydrograph”), a leading producer of ultra-pure graphene, and seadar technologies, developers of the first subsea radar systems, have signed a letter of intent on september 19, 2025 to integrate hydrograph's graphene materials and coating technologies into seadar's current and future undersea products.
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