On 17 October, the 1st Division of the Royal Navy’s 3rd Flotilla was sent to relieve a routine patrol in the Broad Fourteens. It consisted of the new light cruiser HMS Undaunted (Captain Cecil Fox), the flotilla leader, and the Laforey class destroyers HMS Lance, Lennox, Legion and Loyal.
At about 1:40 pm, when about 50 miles south west of Texel Island, Undaunted spotted the smoke of four ships about eight miles away and approaching. Ten minutes later, they were identified as German torpedo boats in line abreast. The British closed and the Germans turned away both at full speed.
However, the British destroyers were new vessels capable of 29 knots and Undaunted 28.5 knots. The German ships, S115, S117, S118 and S119 of the 7th Half Flotilla, were of the 1898 type and completed in 1903. They had been designed for 26 or 27 knots, but a Naval Staff Monograph, written post war for internal RN use, quotes the German Official Naval History as saying that they were capable of only 19 knots.
The Germans were heavily outgunned, so stood little chance unless they got inside torpedo range: two 50 mm (1.97 inch) guns and three 45 cm (17.7 inch) torpedo tubes versus three 4 inch guns and four 21 inch torpedo tubes in the British destroyers and Undaunted’s two 6 inch and six 4 inch guns and four 21 inch torpedo tubes.
Undaunted opened fire at 8,000 yards range at 2:05 pm, but soon ceased fire as the Germans were zigzagging, making it hard to hit at that range. The Germans had been on a mine laying mission, and started to throw their mines overboard. The Naval Staff Monograph suggests that the British mistook the splashes for the launch of torpedoes.
A general action began once the range was done to 2,500 yards. Legion and Loyal concentrated on the western most German, S117, which sank at 3:17 pm according to Fox’s report (3:14 according to his ship’s signal log). Lance and Lennox concentrated on the eastern most German ship, S115, which was out of action by 4 pm, but did not sink for another half hour.
S118 struggled to keep up with the other German ships because of a leaking condenser. She therefore turned towards Undaunted. Korvettenkapitän Georg Thiele, the Half Flotilla commander, realising that his force had no chance of escaping, took S119 after her in the hope of torpedoing Undaunted.
Several German torpedoes were launched, but Fox kept his ship out of their range. All four German ships were sunk, although their skilful manoeuvring meant that the British used a lot of ammunition.
Fox’s report indicates that the second German ship sank at 3:30 pm and the third at 3:55 pm. Only 35 Germans survived, of whom 33 were picked up by the British and two by a neutral fishing boat the next day. 223 Germans were killed including one who died of wounds after being rescued by the British. British casualties were five wounded and their ships suffered little damage.
This was a one sided action, but it boosted British morale after the sinking of HMS Hawke by U9 two days before. More importantly, on 30 November a British fishing vessel trawled up a chest that had been thrown overboard by Thiele’s S119. It contained code books, including one used by admirals and the commanders of squadrons and flotillas.
 Naval Staff Monograph (Historical) vol. xi, Home Waters part ii, September and October 1914. p. 118. This document and others in the same series can be freely downloaded from this link to the Royal Australian Navy’s website.
 Ibid., p. 119.
 This account is largely based on Ibid. pp. 118-19, which in turn is based on Fox’s report and the logs of his ships.