They then winnowed the grain/chaff mixture. A winnowing fan was used to separate the chaff from the grain. Others need to be threshed to separate the cash crop from the straw and chaff. They were used to thresh the grain from the inedible chaff. There were also scattered grains of wheat and chaff. The beating releases the grain from the straw and chaff. Seagnat launchers were provided for chaff or flare decoys. Rice hulls are part of the chaff of the rice. Two compartments behind the weapons bays contain flares, chaff, and towed decoys. The vessel mounts two PK2 chaff launchers. Squadrons quickly had special chutes fitted to their bombers to make chaff deployment even easier. Certain munitions such as flares and chaff have isotropic radiator properties. Both seekers are designed to filter out counter-measures such as chaff and decoy flares. Mustard oil can be extracted from the chaff and meal of the seed. It works by dispensing flares or chaff.