Longer Ron,
Typical nozzle settings for ramp departures varied little but were normally 30-35 for the Harrier II; weight, WoD and 'spot' dependant of course! Also, a positive arrival from a vertical landing is what is required for the reasons Engines mentions however, on the ship it is even more critical as the ship moves. You need to get her down firmly and not hang up above the deck where sideways or, God forbid, rearwards drift may creep in. The gear was designed to take a hell of a thump down (>720 ft/sec) but lateral shear loads could result in 'Outrigger Mortis'. Stop her, steady her, smash her down with some grace.
As Engines nicely explains, F-35B will require a STOVL lift mode to get airborne from a ramped deck in most fits, unless lightweight, when a Kuznetsov departure could very well be possible but not advisable. I too applaud the British design team who have contributed so much to the B's lift system and control laws. A sterling effort indeed!