One implementation of it was a notable part of WWII:
> They came to be regarded as of military strategic importance during World War I, and again during the Second World War, when the US No.2 Tide Predicting Machine, described below, was classified, along with the data that it produced, and used to predict tides for the D-Day Normandy landings and all the island landings in the Pacific War.
From Veritasium : The Most Powerful Computers You've Never Heard Of - the tide calculator plays a prominent part of the video. https://youtu.be/IgF3OX8nT0w (the next video is also in the same topic - Future Computers Will Be Radically Different https://youtu.be/GVsUOuSjvcg and that gets into more modern implementations and uses - https://the-analog-thing.org is the device shown in the video).
https://en.wikipedia.org/wiki/Tide-predicting_machine
One implementation of it was a notable part of WWII:
> They came to be regarded as of military strategic importance during World War I, and again during the Second World War, when the US No.2 Tide Predicting Machine, described below, was classified, along with the data that it produced, and used to predict tides for the D-Day Normandy landings and all the island landings in the Pacific War.
https://en.wikipedia.org/wiki/Tide-Predicting_Machine_No._2
From Veritasium : The Most Powerful Computers You've Never Heard Of - the tide calculator plays a prominent part of the video. https://youtu.be/IgF3OX8nT0w (the next video is also in the same topic - Future Computers Will Be Radically Different https://youtu.be/GVsUOuSjvcg and that gets into more modern implementations and uses - https://the-analog-thing.org is the device shown in the video).