[2rsf]

Define "ensure", you can easily damage any cable undersea or not and if anything under sea ones are harder to get to.

[rightbyte]

You can drag an anchor after your boat and damage them. They are marked on the map to avoid such damages. It is a quite common accident.

[tutfbhuf]

> under sea ones are harder to get to

At least not for state actors, or perhaps well-funded terrorist groups.