Nice to hear from you and your always to the point posts!
My sighting is no good, partly technique and partly what to look at.
I start off each swim being able to sight on fellow swimmers but then almost like magic they suddenly disappear and I am out there on my own.
I have done about a dozen open water swims and slowly getting the hang of it.
Breathing every second stroke as I do I am sure does not help but that's not going to change any time soon specially in open water conditions.
I will keep at it and hopefully improve as I go. In the pool my times continue to improve a bit at a time which is very encouraging.