I had a close encounter of the Ass Boat on our way to Placencia at nite around 11 pm. It was a wake call for me, since then I have been searching a way to improve my survival at sea.
I found this:
It is not most ideal, but it is better than relying on myself 24/7.
Radar? Not all boats carry AIS of any sort.
The problem is that there are no technical solution that will replace proper lookout.
You can have an AIS with a alarm set for CPA.
You can have a Radar with ARPA, automatic target acquisition and CPA alarm.
But both systems are imperfect
There are boats w/o AIS transponders.
The ARPA system can miss some targets.