hmmm, yes, it's a bit bizarre, Terry, and many (not me, God no!) have expended much time debating the issue with the owners, but they just dig their heels in even further when things get heated.
So, Capel Le Ferne is a small wee village and right on its edge during the Great War was a Royal Naval Air Station, RNAS Capel, with three giant airship sheds, although no rigid airships went there, only non rigids for maritime patrol duties; Submarine Scout types and the like. It didn't last long; officially opened in 1915, by the end of 1919 it had closed and of course after the end of military airship ops in Britain with the R.38 disaster in 1921, the sheds were dismantled, although the RAF stayed and it became a wireless station. Nothing survives that hints at the site's past, but being so close to the Channel, was a busy place. The main site is now occupied by a campground, with the road into the site remaining in use as a back road to commercial firms occupying parts of the site. Where this house stands was the site of the accommodation camp and MT section building.
2307 RAF Capel airship station entrance
The only existing piece of infrastructure from the station is this road that leads into the camp site from the back road in the previous photograph. This is at the back of the campground, and if we were here in 1918, we would be staring at a vast airship shed and its wind breaks.
2307 RAF Capel airship station campground
it is difficult to place the site into context without some form of orientation, so you'll have to use your imagination. Pictures of Capel on the net are rare; I'll leave it up to you to do some research, but take a look here:
RNAS Capel - WWI Airship Station
This image shows a field - one of many that I stood on the edge of during this trip and photographed emptiness, but for the fact that there was some infrastructure where aeroplanes and airships buzzed about at one time. Again, we would be looking directly at the front doors of a giant airship shed if we were here in 1918. The tree border to the right is the edge of the camp site, with the previous image at diagonally the opposite end of the site from this picture. It was taken from the new road, which runs straight through where one of the sheds stood.
2307 RAF Capel airship station shed location
The Royal Oak is a direct link to the past as it existed at the time of the airships, and sits directly opposite the first image at the entrance to the site, with the fence line at the right of this picture following the road.
2307 RAF Capel airship station Royal Oak
Just a wee ways out of Capel on the main road is a slip road with a walkway to the coast that goes all the way to Dover, over the cliff above Fan Bay. On the cliff's edge is this observation post for a vital component of Britain's air defence in the between the war's period. It is facing towards Folkestone to the left of the image.
2307 Kent observation post
This is an acoustic parabolic mirror, or simply a sound mirror that was to form part of a chain of these things along the coast for detection of oncoming aircraft by sound waves. There was a stand with a microphone located directly in front of the mirror that captured any noise from the drone of aeroplane engines. Note the OP from the previous photograph to the left on the top of the hill.
2307 Kent Sound Mirror i
These were quite precise structures made to exacting tolerances, but proved almost useless as they recorded all sorts of noise that might have been mistaken for aeroplanes, which is where the OP comes in. You also couldn't gauge distance nor height of the approaching aeroplanes from the sounds, neither. They weren't very effective, but it was better than nothing. With the development of radar and the instigation of the Chain Home system, they fell out of use and the network was never finished.
2307 Kent Sound Mirror iii
There's a big site on the Romney Marshes, but it's on conservation land and is only accessible during certain parts of the year. There are three big mirrors of varying sizes there. Others still survive round the country, including one in Dover, but this is probably the most accessible given its on a public walkway.
2307 Kent Sound Mirror ii
Dover. This is taken from ramparts on the cliff face from beneath the castle, which I visited.
2307 Dover
Admiraly Pier, Dover to the right of the following image, where the cruise ship is berthed has significance as it was the very first spot on the British Isles to be subject to aerial bombing. On 21 December 1914, a Friedrichshafen FF 29 seaplane from Seeflieger Abteilung Eins at Zeebrugge arrived overhead and the pilot dropped two bombs that fell harmlessly into the sea. A foretaste of things to come.
2307 Dover Pier
Next, Dover Castle and Operation Dynamo.