 The next day, they sailed to seek out and destroy an enemy submarine reported off Newfoundland, north of Flemish Cap.They made first contact on 13 March, and during the next 5 days carried out persistent search-and-destroy operations.On 18 March in waters west of treacherous Sable Island, day-long hedgehog and depth charge attacks brought "air bubbles, wreckage, and large quantities of oil" to the surface.