RAF Sealand went up and down with the tide!!
So does Bae Warton. The ground moves by one or two millimetres.
Where Warton bolts together sections of Typhoon, they have such a close tolerance that the shop floor moves on computer automated jacks and fricken laser beams compensate for the daily up and down motion.
http://www.baesystems.com/article/BA...3D100ivb3byl_4