to quote your original statement, assuming the ship steams at 30kts and has a slight headwind (lets say 10kts) then you could easily approach at 70 kts and have a "deck speed" of 30 kts. This would give you speed in hand to deal with the turbulence and more than enough stopping distance. That said with a 300 meter deck to aim at then you could land a 172 on it at anchor with no wind assuming you were light and landed nice and early. Just not too early mind!
I never get Prune, someone asks a simple question out of curiosity and gets told of for it. Keep asking 'Pal'!
