The sea lock at Barry Docks (nprn 34234) comprises, in effect, two adjacent locks. The more westerly, Lady Windsor Lock, is a conventional narrow lock measuring some 200m between gates and 20m wide. The more easterly lock uses Dock No.3 as its main chamber; Dock No.3 measures 184m long north west to south east by 152m and has a pair of gates in the north west wall and another pair in the south east wall. Both locks independently allow access between the open sea and Dock No.1.
B.A.Malaws, RCAHMW, 07 November 2008.