Included columns are:

Zone number - referring to one of the areas surveyed:
Zone32 Whole of East Coast
Zone33 Tay
Zone34 Moray Firth
Zone35 Southern Trench
Zone36 West Orkney
Zone37 EMEC (Orkney)

Date: Date of flight
Time: Time at the given position along the track
Latitude: Decimal Latitude of the position along track
Longitude: Decimal Longitude of the position along track
Height: Height of aeroplane at track position (m)
Distance: distance along the track (km)