[4] The Sprucol was a 1,137 GRT tanker being operated by the Royal Fleet Auxiliary at the time of engagement, when it was damaged off the English coast but made it back to the Humber with no casualties.

[7] In his 1933 memoirs,[8] Fürbringer alleged that, after the sinking, HMS Garry hove to and opened fire with revolvers and machine guns on the unarmed crew in the water.

The memoir states that the shooting ceased only when the convoy that the destroyer had been escorting, and that contained many neutral-flagged ships, arrived on the scene, at which point "as if by magic the British now let down some life boats into the water.

Lightoller explained, "In fact it was simply amazing that they should have had the infernal audacity to offer to surrender, in view of their ferocious and pitiless attacks on our merchant ships.

Armstrong suggests that a more likely culprit is not Garry but instead motor launches of the Auxiliary Patrol who claimed to have raked the stricken submarine with machine gun fire, a destroyer being unlikely to have the small arms available to conduct the massacre.

[8] HMTBD Bonetta arrived late on the scene and picked up five survivors, including the captain, but one of them, the engineer officer, died on deck immediately after being taken out of the water.

The Bonetta's duties around that time had included picking up many, badly wounded, survivors, and dead, from fishing boats, which had been shelled by a German submarine, off the entrance to the Tyne.

[2] An album of photographs of the vessel has been shared by Tyne and Wear Archives "The sinking and raising of UB-110" The British were unsettled by the discovery during its salvage was that some of its torpedoes were fitted with magnetic firing pistols—the first they were able to properly identify.