a month ago
Aerial fiber will survive in the water.
Boats but more important their ankers or fishing nets can damage the fiber
If the acid water eats away said boats the cable won't survive either.
And sharks. Never underestimate them.
a month ago
That's a really specialized application - most cable river/creek crossings are done at an exiating bridge or even with a suspended pipe/conduit across the water. There are a lot of things that can go wrong with a water crossing, including disturbances at the water's edge by people or animals, dredging, fishing.boating (as already mentioned), etc. Even pipelines are usually built to suspend over a bridge so that this is not an issue. The only large under-river crossings I'm familiar with are either so deep that they go below any saturated soil (done with large horizontal drilling) or inside tunnels that go under the river to start with (think New York City).
The only commercial underwater plow systems I'm familiar with are for trans-oceanic cables, and that's not what you are looking for, I'm pretty sure. If it were me and I absolutely had to do things this way I would look for a way to build a conduit on the river bottom with a plastic/steel duct system to protect the cable - maybe something like this - https://frecompositesinc.com/products/epoxies/underwater.html
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