Military grid.

Air information as at 16 August 1968.

Relief shown by contours, gradient tints, spot heights and land forms.

Standard map series designation: M523.

Includes inset maps.

Includes compilation diagram, location map for counties, index to adjoining sheets, magnetic declination diagrams, and grid diagrams.

Aeronautical information overprinted in purple on older printings.

Set contains various editions.