No, the kine theodolites were in grey domed cupolas, around the airfield.
There were various goings-on at the beach by Maritime types, + a target for things such as unguided Matra / Sneb rockets etc.
On one such trial involving a multiple rocket firing by one of our development GR5's, ZD319, a Volkswagen camper van somehow got onto the beach and happily bimbled along straight in front of the target !
There was also a thing like a young oil rig, a target for the development of a certain missile.
This had 2 decks, the idea was that there'd be photographers under the target ( which raised on an arm ) so as to process the trials films quickly and/or reload cameras.
I think even Kenny & co. were a bit dubious about that one, as far as I know the photographic staff stayed ashore.