There are a couple of ways you can do this on the water (radar, AIS), but the names for doing so escapes me. In ocean navigation there is the notion of a tripwi

There are a couple of ways you can do this on the water (radar, AIS), but the names for doing so escapes me. In ocean navigation there is the notion of a tripwire: if X happens, do Y to get your shit together. Ocean traffic also sometimes has the issue of many-thousand-ton vehicles on autopilot while the crew are elsewhere or asleep (not all the time, but enough to be unsettling). Then things get fantastically complicated as you near the destination.