Far more dangerous are tug and tow operating near shore.

The chain from the tug drops down deep into the water, and the fucking tow doesnt make any noise cause it has no propulsion. All you can hear is the chain clanking and typically it’s at the connection point on the tug, not the middle of the chain.

So you end up with a chain you can’t see or hear drooping down right in front of you. God forbid you catch that chain on the sail. Either the tug is going down or the submarine is gonna take a shitload of damage as the chain tears up the sail.