3 - Aberdaron to Porth Oer
From Mynydd Bychestyn a view to Bardsey Island .
Turbulent Waters around Carreg Ddu ( black rock )
The two mile wide Swnt Enlli / Bardsey Sound is one of the most dangerous
stretches of water off Britain . Tidal flows up to 9 knots are common.
Ref: 241
Date: 10/10/2021
Location: SH 1513 2429