Zeppelin flight path map possible radio intercept from direction finding equipment in Bellmount Tower. Zeppelins flying from Cuxhaven detected by Marconi Direction Finding stations 27th/28th November 1916. Note RI just south of Bellmount at 02:28 of L21 and this Zeppelin’s destruction, RIP, at 06:37 off Lowestoft shot down with loss of all crew by 3 Royal Naval Air Service planes (Bodleian Library, Oxford). Author’s annotations red.
Castle provides details of L21's mission and demise. See also the
history of the Tower.