Editing HMS E11 (section)

===Mediterranean operations===
[[File:E11 in action.jpg|thumb|left|''E11'' torpedoes the ''Stamboul'' off Constantinople, 25 May 1915]]

In May 1915, still commanded by Nasmith, ''E11'' arrived at the [[Dardanelles]] to join the submarine campaign in the [[Sea of Marmara]].  ''E11'' was the second submarine to undertake a successful tour, following the {{HMS|E14||2}} which had passed through the straits on 27 April.

The ''E11'' passed through the Dardanelles on the night of 18 May.  Surfacing off the town of [[Gallipoli]], Nasmith captured a Turkish sailing vessel and lashed it to the [[conning tower]] to act as a disguise.  However, this [[ruse of war|ruse]] failed to attract any targets, so after several days he abandoned it.  Travelling up the Sea of Marmara, he sank a [[gunboat]] and several other small craft on 23 May.  The following day, near the port of [[Rodosto]] (today [[Tekirdağ]]), ''E11'' encountered the Turkish transport ''Nagara'', laden with [[ammunition]].  Aboard the transport was an American journalist, [[Raymond Gram Swing]], from the ''[[Chicago Daily News]]''.  Nasmith sank the ship after it was abandoned by the crew and passengers. Nasmith sank another transport and forced one aground before being driven away from the shore by some Turkish [[cavalry]].

On 25 May 1915 ''E11'' reached [[Constantinople]] (now [[Istanbul]]). Nasmith was searching for the German warships {{SMS|Goeben}} and {{SMS|Breslau}}, but when he surfaced at 12:40, he sighted the elderly transport ''Stamboul'' lying alongside the Tophane [[Arsenal]].  Nasmith's first torpedo ran in a circle and nearly struck the ''E11'', however the second torpedo hit ''Stamboul''.  Under fire from shore-based [[artillery]], ''E11'' dived to make her escape.  Caught in the strong [[Bosphorus]] current, ''E11'' was out of control for 20 minutes until she settled on the bottom near the [[Maiden's Tower|Leander Tower]].<ref name=DP /> ''Stamboul'' failed to sink, but was beached at [[Harem, Istanbul|Harem]]. ''E11''{{'}}s attack on Constantinople, the first by an enemy vessel in over 100 years, had an enormous impact on Turkish [[morale]], causing a panic in the city and compelling ''Goeben'' to shift to a safer mooring.
[[File:Cheering E11.jpg|thumb|left|The crew of {{HMS|Grampus|1910|6}} cheering the surfaced ''E11'' after a successful attack, 1915.]]
''E11'' returned to the Bosphorus approaches on 27 May and sank more ships, but running short of torpedoes and with mounting mechanical problems, Nasmith headed home on 5 June. On his return passage through the Dardanelles he encountered an anchored transport near the Moussa Bank which, despite his vulnerable position and the poor state of the submarine, he attacked and sank with his final torpedo.<ref name=DP />  Passing through the Narrows near [[Kilid Bahr]], ''E11'' snagged a moored [[naval mine|mine]]. Nasmith had to tow the mine out of the straits before he was able to disentangle the submarine. On ''E11''{{'}}s first tour, eleven ships were sunk or disabled.  For this successful tour Nasmith was awarded the [[Victoria Cross]], the third submarine commander to receive the award during the Dardanelles Campaign.

''E11'' was on her second tour when, on 6 August, she successfully torpedoed  the Turkish [[torpedo cruiser]] {{ship|Ottoman cruiser|Peyk-i Şevket||2}}, causing serious damage.<ref>Langensiepen & Güleryüz, pp. 38–39</ref> Two days later 8 August 1915 as a new British landing was underway at [[Suvla]], ''E11'' torpedoed the antiquated Turkish [[pre-dreadnought battleship]] {{ship|Ottoman battleship|Barbaros Hayreddin||2}} off [[Bulair]] at the northern entrance to the Dardanelles. The ship sank with the loss of 21 officers and 237 men.<ref>Langensiepen & Güleryüz, p. 28</ref> ''Barbaros Hayreddin'' was one of two Ottoman battleships sunk during the campaign. Visiting Constantinople again, ''E11'' sank a [[Black Sea]] [[collier (ship type)|collier]] [[SS Northenden (1886)|''Isfahan'']] as it was preparing to unload — a significant blow as [[coal]] was the main fuel source and supplies were scarce.  Moving into the [[Gulf of Izmit]], on the night of 20 August, ''E11''{{'}}s first officer, [[Lieutenant]] [[Guy D'Oyly-Hughes]], swam ashore and blew up a section of the Constantinople–[[Bagdad Railway|Baghdad railway]] line, a feat for which he was awarded the [[Distinguished Service Cross (United Kingdom)|Distinguished Service Cross]]. Navigating Officer Lieutenant Robert Brown was also awarded the Distinguished Service Cross. A reservist from the Merchant Navy, Brown had famously been born rounding the Cape Horn on the clipper ''John Gambles'', the sister ship to the more famous {{ship||Cutty Sark}}.

''E11'' made three tours of the Sea of Marmara and sank in total 27 [[steamship|steamers]] and 58 smaller vessels.<ref>{{cite web |title=E11's Exemplary Service |url=http://rnsubs.co.uk/articles/service/e11s-service.html |website=rnsubs |access-date=30 September 2020}}</ref>