Beach Jumpers saw much action in World War II. Their first operation was in Operation Husky. On the night of 10 July 1943, Beach Jumper Unit 1 (BJU 1) was ordered to conduct a diversion off Cape San Marco, 100 miles west of the HUSKY landing area. The first attempt was recalled due to hazardous seas. On D+1, the weather was better and the operation began at 22:00. At 3,000 yards off shore, three of the ASRs prepared their heaters, one ASR proceeded a thousand yards ahead and began to lay smoke. As the sound boats prepared to make their run parallel to the beach, a searchlight from Cape San Marco illuminated the area, accompanied by small arms and artillery fire. At 02:30 the sound boats were ordered to secure their heaters and approach the beach, which they did, firing guns and rockets. All boats retired on a course back to their home port at Pantelleria, Sicily.