Waterway memorial day

On this day in 1871 the Hydrographic Bureau was established in the Naval Department of the Ministry of War (now the Marine Information Department of the Japan Coast Guard) within the Meiji government. In commemoration of that, in 1971 the Japan Coast Guard registered the "Waterway Memorial Day" (Waterway anniversary) for this date annually.

Each year on September 12th the Commissioner of the Japan Coast Guard announces the people and organizations that are receiving a commendation for their contribution to marine information services. This year, 2025, six people and one organization were presented with a commendation. Supposedly there are other events and talks held in relation to this anniversary annually too, but personally I am not familiar with any.

Had you heard about the Waterway Memorial Day (in Japanese 水路記念日) before?  Do you know of any events connected to this anniversary?