As in the case of the action on February 17 the distinguishing feature of this exploit was the great restraint shown by Captain Campbell in withholding his fire although his ship was so seriously damaged.  The gallantry and fine discipline of the ship’s company, their good shooting and splendid drill, contributed largely to the success.  The decoy ship, although seriously damaged, reached harbour.

On July 10, 1917, a decoy ship, H.M.S. Glen, a small schooner with auxiliary power and armed with one 12-pounder and one 6-pounder gun, commanded by Sub-Lieutenant K. Morris, R.N.R., was in a position about forty miles south-west of Weymouth when a submarine was sighted on the surface some three miles away.  She closed to within two miles and opened fire on the Glen.  The usual practice of abandoning ship was followed, the submarine closing during this operation to within half a mile and remaining at that distance examining the Glen for some time.  After about half an hour she went ahead and submerged, and then passed round the ship at about 200 yards distance, examining her through the periscope, finally coming to the surface about 50 yards off on the port quarter.  Almost immediately she again started to submerge, and fire was at once opened.  The submarine was hit three or four times before she turned over on her side and disappeared.  There was every reason to believe that she had sunk, although no one was on deck when she disappeared.  No survivors were rescued.

The feature of this action was again the restraint shown by the commanding officer of the Glen and the excellent discipline of the crew.

On August 8, 1917, the decoy ship H.M.S. Dunraven, in Lat. 48.0 N., Long. 7.37 W., armed with one 4-inch and four 12-pounder guns and two torpedo tubes, commanded by Captain Gordon Campbell, V.C., R.N., sighted a submarine on the surface some distance off.  The submarine steered towards the ship and submerged, and soon afterwards came to the surface some two miles off and opened fire.  The Dunraven, in her character of a merchant ship, replied with an after gun, firing intentionally short, made a smoke screen, and reduced speed slightly to allow the submarine to close.

When the shells from the submarine began to fall close to the ship the order to abandon her was given, and, as usual with the splendidly trained ship’s company working under Captain Campbell, the operation was carried out with every appearance of disorder, one of the boats being purposely left hanging vertical with only one end lowered.  Meanwhile the submarine closed.  Several shells from her gun hit the after part of the Dunraven, causing a depth charge to explode and setting her on fire aft, blowing the officer in charge of the after gun out of his control station, and wounding severely the seaman stationed at the depth charges.  The situation now was that the submarine was passing from the port to the starboard