A permanent dry dock with concrete or stone sides and the entrance to which is sealed by a removable caisson. Graving being an old term for the practice of burning off the seaweed that had accumulated on the ship's bottom.
Lizibuko elisisigxina elomileyo elinekonkreyiti okanye icala lamatye kunye nendawo yokungena ecikiweyo ngento esukayo. Uqingqo ligama lakudala elisetyenziselwa ekutshiseni ukhula lolwandle oluninzi ngaphantsi kwenqanawa.