昼間障害標識
ちゅうかんしょうがいひょうしき
obstruction markings (red or yellow and white markings on structures taller than 60 meters in accordance with Japanese aviation law)
昼尚暗い is read as ひるなおくらい (hirunaokurai) and means dark even in the daytime.
ひるなおくらい
hirunaokurai
ちゅうかんしょうがいひょうしき
obstruction markings (red or yellow and white markings on structures taller than 60 meters in accordance with Japanese aviation law)