meanwhile, on the night of 7th/8th, at about 1am on the 8th, "wolverine" sighted a u-boat on the surface which she identified as "u-47". she and " verity" attacked, and after 4 hours, which had shown evidence of damage, the u-boat was driven to the surface within yards of "wolverine", before diving again. the destroyer sent down a pattern of depth charges and was rewarded with an underwater explosion, marked by an orange glow, and flames that broke the surface.