In this task, you are given a sentence or phrase in Xhosa. You must translate it to English in a way that is equivalent in terms of meaning and grammatically correct.

Ikakhul kumthi wengcali owayemsebenzisa ukuqinisekisa ijonga nakwisinyithi esincinci.
In particular, his large wooden astrolabe which he had used for shore observations, and his small metal ones.