The following was found off the coast of Canada and USA on Google Earth. The coordinates below are that of the object. Following the trail backwards results in blurred/edited imagery (perhaps an attempt to hide the object’s previous position/s. Please contribute to this thread constructively.

49.98865392412292, 140.07056950996122

Roughly 4.61 kilometres, or 2.8 miles.

Contribution 1: via the lovely u/Bluinc

Shows the trail passing through/by a seamount.