航路 こうろ標識 ひょうしき

kōrohyōshiki

1. Not a navigational mark.; Not a route marker.

1. Was a navigational mark.; Was a route marker.

1. Navigational aids

1. Navigational aid; Route marker

1. It is not a navigational mark.; It's not a route marker.

1. It's not a navigational mark.; It's not a route marker.

1. Was a navigational aid.; Was a route marker.

1. Navigational aid.; Route marker.

1. It is not a navigational mark.; It is not a route marker.

1. Wasn't a navigational mark.; Wasn't a route marker.

1. Probably a navigational marker.; Probably a route marker.

1. Was not a navigational marker.; Was not a route marker.

1. It wasn't a navigational marker.; It wasn't a route marker.

1. Probably a navigational aid.; Probably a route marker.

1. Was not a navigational mark.; Was not a route marker.

1. If/when the airway marker…; If it were an airway marker…

1. If it is an airway marker.; If it’s a navigational aid.

1. If/when a navigational aid…; If there’s a navigational aid…