Sentence:  The transducer itself <WSD>moves</WSD> the beam in a sector scan , just like a radar antenna , while the entire transducer structure is moved over a 90 - degree arc in front of the eye to `` look into '' all corners . 
Meaning of the word marked with <WSD> tags:  cause to move or shift into a new position or place, both in a concrete and in an abstract sense