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by toast0 744 days ago
Cable ferries exist, but the longest cable ferry route is 2 km [1]. Ignoring material science conerns, energy efficiency concerns, and the difficulties they add for other navigation, cable ferries tend to be quite slow even compared to intercontinental shipping, have a single vessel per route and have a two point route.

[1] https://en.m.wikipedia.org/wiki/MV_Baynes_Sound_Connector