Approach
From south, Maen Piscar (dries 1.7m) is a major hazard on the chord
between Rhoscolyn Head and Penrhyn Mawr. Give coastline 0.5 mile
clearance from Rhoscolyn beacon until Trearddur opens, then turn in.
From the north, go south of Penrhyn Mawr until chimney (127m. R.lts.)
bears 055° before turning into anchorage.
Dangers
Reefs extend half mile off headlands to north and south of Penrhos
Bay. Maen Piscar (dries 1.7m) on chord between headlands. Extensive
drying patch to north of main anchorage. Heavy mooring chains in
Porth Diana (to south of TBYC) make anchoring impossible.
Shelter
From north-west through north to south-east. Very exposed to
south-westerly winds. Fairly good holding on sand and shingle. Pick
up private mooring if possible.