A datum line from which is determined the exact location of the various parts of a ship. It may be horizontal and straight as the moulded base line, or curved as a moulded deck line or a moulded frame line. These lines are determined in the design of a vessel and adhered to throughout the construction. Moulded lines are those laid down in the mould loft.
Umgca osisiseko omisela eyona ndawo eyiyo yendawo ezahlukeneyo zenqanawe. Usenokuthi tyaba uthi ngqo njengomgca omxinwa osezantsi, okanye uvuleke njengomgca omxinwa womgangatho wenqanawe. Okanye umgca osisiseko wesakhelo. Le migca emiselwa kulwakhiwo lwenqanawe kwaye zincamathele kuso sonke isakhiwo.