The only offshore mooring
I have seen is on a reef 100miles from Texas
coast used for dive boats on the reef. I suppose you moor there overnight, but I wouldn't. The mooring line is often missing from being run over by freighter, or severe storm. You wouldn't want to be moored there if either happened.
Plus if you moored to sleep, expect to have someone from a line of fishing
boats banging on your hull
, to either fish
, or get out of the way so they can.
Offshore you would have someone doing watches, so some one is at the helm
at all times.
How often do I go offshore? As much as I can.
The reasons to go that far out is, either to go from point A to point B, or to go out for deepwater fishing
In some places I suppose you could just go out for the quiet relaxation, but around here there is way too much shipping/fishing traffic for that to be safe, plus the numerous unmarked, unlit oil
rigs that make even passage
making risky without a good lookout.
If you were in an area with no other ships, and out of drift range from the nearest obstacle, and had calm seas. in theory you could just sleep and drift. But it has been a long time since that was possible.