In my ongoing translation
of the Acklington log book I came across this:
19 Aug 1943
The Station Commander inspected a concrete plinth intended for the siting of beam approach apparatus completed in a field near AMBLE (1" Map 747237) N.E. of and in a line with the principal runway (No. 23) This plinth is in replacement of one long existing at the S.W. end of the runway and which was incorrectly sited.
I guess that plinth is long gone? 'open-casted'?
converting that Cassini military grid to lat and long, if I'm doing it right (I guess so as it's near Amble and not in the middle of the Pacific ocean as normal for me) gives you this:
https://maps.google.co.uk/maps?q=55....69043&t=h&z=15 (the green arrow, not Hope farm cottages)
I assume this is a searchlight type device to line up aircraft onto the runway?