Adrodd fel Amhriodol

' Graving Dock (IE could take a ship and then have the water pumped out to allow work on the hull below the waterline.) '

Dywedwch wrthym pam mae’r cynnwys hwn yn amhriodol *(gofynnol)

Dewis categori *(gofynnol)

Os ‘Arall’ rhowch fanylion (dewisol)

Eich enw (dewisol)

Eich cyfeiriad e-bost (dewisol)

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