Clevis pin then, forgive my mistake.
I have an auto-inflate PFD with manual function. Unscrew the auto sensor, screw in the blocking plug, presto the auto is manual.
If l am not mistaken, if one unscrews the auto sensor on any PFD it becomes manual.
The auto function, if one is clipped to the boat at all times on deck, seldom needed.
The most important thing is, the jack line should not run the whole length of the boat but end about 2-3 metres from the transom depending on the length of the tether. If one falls overboard is not dragged b e h i n d the boat but with at least in level with the transom!
If one falls in on the lee side has an advantage of the sides being lower in the water, thuss easier to climb back on.
An appropriate cutting implement clipped to the PFD might come handy to save ones skin. So does an auto strobe light and a personal EPIRB.
I see the merit sleeping with a PFD on in certain situations. When one is in an emergency just waking up, there is one less thing to be worried about.