home in

Etymology
The phrase originates in military use in the early 20th century, apparently by analogy with the older term homing pigeon. From the 1960s it is also found in the mistaken variant hone in. 

Verb

 * 1)  To draw close to a destination, especially using radar; to move towards a target.
 * 2)  To focus or narrow down to something; to find, draw closer or move towards, as by trial and error or a gradual seeking process.

Synonyms

 * zero in

Translations

 * German: sich dem Zielgebiet nähern


 * German: (in Richtung) ... einschwenken, Kurs nehmen (auf)