Also a structural change in the Oil business
even 10 years ago it was a lot of large International companies who had people world-wide so there was a constant flow in and out of ABZ - these days a lot of the fields are owned by smaller Aberdeen outfits with no footprint elsewhere so you don't get the travel
plus the platforms etc are down-manned/umanned and no-one is building anything out there . In the 70's and 80's you'd have hundreds working offshore building things - now most of the construction is done onshore in a yard and the (v large) modules are lifted into place - or it's a FPSO that just sails in from Korea.......