This ground crew call warning horn designed for Boeing and produces 108db (+10db, -3db) at a frequency of 25-20,000 Hz.
This ground crew call warning horn designed for Boeing and produces 108db (+10db, -3db) at a frequency of 25-20,000 Hz.
This ground crew call warning horn designed for Boeing and produces 108db (+10db, -3db) at a frequency of 25-20,000 Hz.