The AMSU instruments scan continuously in a "whisk broom" mode. A smaller whisk broom or brush is sometimes called a duster. The Ocean Color and Temperature Scanner (OCTS) is a whisk broom radiometer developed by NASDA. As well, Whisk Broom II was the damsire of Seabiscuit and Double Jay. TM is a whisk broom scanner which takes multi-spectral images across its ground track. Whisk Broom was one of the best British-trained two-year-old of 1909.