The boundary fence for MOS EE AA Ynyslas is discernible running east-west crossing the access track. Sections are also discernible running north-south further to the north crossing to join thje enclosure around The Bungalow (NPRN 506722).

Sources include:
RAF aerial photographs 106G UK 1450-4212, 7 July 1948

Maritime Officer, RCAHMW, March 2012.