Abstract
The distinctive wave pattern that forms behind the stern of a moving ship is the result of a combination of divergent and transverse waves across all wavenumbers. At a fixed point in space, as a ship travels past, these waves produce a surface elevation signal in which properties of the ship are encoded in a complicated way. Motivated by the challenge of how to decode such signals, we explore their frequency spectrum using spectrograms. Recent findings are extended to allow for the ship to accelerate along arbitrary paths instead of simply traveling steadily in a straight line.
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