Searchlight emplacements :- (#2 through to #6 on the layout map)

Each thumbnail above represents an individual structure.
I have it on good authority that these are searchlight emplacements. From what I found so far there are 5 on site. However from a map of Singapore's coast guns, it tells of 6X 90cm searchlights as having been installed at Pengerang.

You can see that the interiors are painted blue. I'm not sure if this was their period colour or have been repainted postwar? Everything in inside has been stripped bare but you can see where the electric wires and boards had been mounted.

There were 2 emplacements on the South side which had the overhanging sections of roof broken down. I noticed there were hardly any iron rod reinforcements inside the concrete which seems below standard quality to me for an emplacement structure