If only a single cable break occurs, every point is still reachable from every other point -- the worst thing that happens is that ping times might increase because the packets will have to travel a longer route.
As typical L2 technology for such cables is SDH/SONET, the difference in latency after single ring failure tends to not be noticeable for normal IP traffic.
The total length of the cable is 'only' 15,428km. So the maximum one-way latency between any two points is only ~70ms assuming 0.7C. You'd definitely notice if you were gaming, but probably not if you were watching YouTube.
If only a single cable break occurs, every point is still reachable from every other point -- the worst thing that happens is that ping times might increase because the packets will have to travel a longer route.
This layout is called a self-healing ring: https://en.wikipedia.org/wiki/Self-healing_ring