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  • Miscellaneous, Original Research

Battery Observation Post – DRF

Often found in coastal artillery forts, this concrete pedestal would have been home to a Depression Range Finder (DRF), an instrument designed in the 1880s used to calculate the distance…

Thank you for visiting Frontline Ulster. While I hope to provide informative and honest articles, sometimes I may get things wrong. Please contact me if this is the case and I will make any corrections necessary. Any location featured on this site does not indicate right of access. Please always seek the landowners permission where appropriate. All images are my own unless otherwise marked. Military sites can be dangerous, please take care and never cause any damage. Leave nothing but footprints and take nothing but photographs.

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