 This success in what became known as the Air @-@ Surface @-@ Vessel radar ( ASV ) role , airborne radar for detecting ships at sea , led to continued demands for additional tests throughout the year . Interest continued to grow , and this would ultimately be one of the reasons that airborne intercept sets would be delayed ; the team spent a considerable time in 1937 and 1938 working on the ASV problem , and ultimately these sets went into operational use first . 
