The "Royal Air Force March Past" is the official march of the Royal Air Force (RAF) and is used in some other Commonwealth air forces. The original score was completed by Walford Davies in 1918 for the new RAF. It combined the rhythm of the bugle call of the Royal Flying Corps with that of the Royal Naval Air Service. The call appears in both the introduction and the coda. It was originally known as the Adastral I (in reference to the RAF's motto). The second part of the march past, the trio, was composed by Sir George Dyson.