At the beginning of the war, the He 115 was used for dropping parachute mines in British waters, normally aiming for narrow passages close to busy ports on the English south coast; the River Thames was also a prime target. The aircraft had its finest moment on anti-shipping operations against Arctic convoys from bases in northern Norway. Because the first convoys lacked air cover, the slow and lightly armed He 115 was less vulnerable than near the English coast.