spires is a form of:

Navigator



noun
1.
(Person skilled in the science of navigation, person who determines or plots the course of a ship, airplane, or spaceship) នាវឹក, អ្នកធ្វើនាវាចរណ៍, ឬអាកាសចរណ៍, បុគ្គលិកបើកបរនាវា, ស្ទង់មើលទិសទី (ក្នុងពេលធ្វើអាកាសចរណ៍នាវាចរណ៍)
Example: On the training flight, Mr. UDOM was pilot and Mr. SOK was navigator.
2.
(បច្ចេកទេស) អ្នកស្ទង់មើលទិសទី (ក្នុងពេលធ្វើអាកាសចរណ៍ ឬនាវាចរណ៍)
ENGLISH MEANING
noun
1.
One who navigates or sails; esp., one who direct the course of a ship, or one who is skillful in the art of navigation; also, a book which teaches the art of navigation; as, Bowditch's Navigator.