To the seaward of the pillbox is a concrete plinth and monolith which may have been the base for the Kinnie Theodolite. The instrument would have been used to tracking projectiles under test (see NPRN 408394).
Maritime Officer, RCAHMW, January 2010.
Adnoddau
LawrlwythoMathFfynhonnellDisgrifiad
application/pdfRCSR - RCAHMW Digital Site ReportsNon-Intrusive Survey of Ynyslas Nature Reserve:Aberdyfi Estuary carried out by RCAHMW 2012 and updated 2014.
