Here’s how to remember the difference between “home in” and “hone”: A person, bird or aircraft homes in on a target, but a person hones his or her skills. Most style guides tell us to steer clear of “hone in.”
Examples:
Daenerys Targaryen’s dragons home in on their targets before they light them afire in Game of Thrones.
Samwell Tarly never really honed his sword-fighting skills in Game of Thrones.