Switzerland's contribution to naval history

What notable contribution has Switzerland made to naval history?

Swiss forces used skilled boatmen for movement and supply on lakes, creating a form of shallow-water warfare even without an ocean-going navy.

Switzerland did not build a conventional sea fleet, but its geography produced military activity on long lakes. Skilled local boatmen could move troops and supplies around terrain that was difficult to cross by road. Those craft supported engagements that resemble modern littoral operations more than blue-water naval battles. The exact battle example remains uncertain and is left unnamed. Control of inland water and the logistics it enables still belong in naval history, even for a landlocked state.