A wooden disc called a truck is fitted to the head of a topmast or a polemast; it is usually provided with one or two small sheaves to take signal halyards.
Icwecwe lenkuni elibizwa ngoyamaniso lilinga niselwa kwintloko yeflegi ende ephezulu, kusoloko kunikelwa ngenye okanye ngezimbini ishivs ezincinci zithathe umqondiso.