On the 30th June 1918 "E 21," being a unit of our flotilla working with the Italian Navy, torpedoed and sank an Austrian ammunition transport inshore close to Piana, one of the islands that fringe the Dalmatian coast. She then fired at an escorting torpedo-boat (who dodged and saved herself), and she was then bombed by an aeroplane without receiving damage. On the 1st July she charged her batteries in Mid-Adriatic and moved east towards Lissa Island. On arrival there she dived up to St Giorgio harbour (I wonder what Tegetthof would have thought of this sort of thing in 1864?), only turning back a mile from the entrance when it was plain that there were no ships inside. She moved on along the coast and looked into Civita Vecchia, but saw nothing worth attack there. Between Brazza Island and Lesina Island runs the Greco de Lesina Channel--a gap rather after the pattern of the Dardanelles. E 21 dived to 130 feet to pass under the minefield which guards the "narrows," and went through by compass and dead reckoning. After four hours she rose and, being then well through the straits, proceeded towards Makarska on the surface. At dawn she dived again and did a sweep round the bay, finding no shipping in the harbours. Returning that evening, she safely negotiated the minefield at 130 feet depth and proceeded west and north to look at Zerovia Island, near the locality where she had sunk the transport. She found nothing to fire at there, and the weather getting misty and bad for periscope work, she shaped course back to Brindisi on the 4th. She had been sent out to catch Austrian transports, and having sunk one which was well out on its way, and having been bombed for doing so, she had gone right back along the traffic route to see if "running to heel" would provide another chance, while at the same time her absence would give time for the excitement off Piana to die down. On her return she found it had died down to the extent of nothing being in sight; but her strategy had nevertheless been sound and well conceived. Aeroplane bombs around the Heligoland Bight became common in 1918. A typical "Aircraft" report comes from "E 56" (Lieutenant Satow) in May of that year. Her station was by the South Dogger Bank light:-- "23rd May.--South Dogger, bearing north 3 miles at 1 A.M. 4.30 A.M.: a Zeppelin in sight N.E.--a long way off. 10 A.M.: sighted seaplane in periscope two miles on port beam coming towards me--dived 60 ft.--altered course to west. 10.15: one bomb--dived to 90 ft.--up to periscope depth and continued patrol. 6.20 P.M.: three bombs--dived to 80 feet. 6.37: three bombs--altered course to N.E., depth 70 feet. 6.50: one bomb. 7.37 P.M.: at 80 feet six or seven bombs dropped, three of them close to boat.