Analysis of information sources in references of the Wikipedia article "Lighthouse" in English language version.
[Maplin Sands] was not, however, the first screw-pile lighthouse actually erected, for during the long preparation process which was carried on at Maplin Sands, a structure of the same principle had been begun and completed at Port Fleetwood...
A lighthouse located offshore, built on a foundation of pilings, rocks or caissons.
A lighthouse located offshore, built on a foundation of pilings, rocks or caissons.