 Nyorai kupfuurira kweiyi ndima - Usiku hwa 34 September 1917, S18 yakakuvadzwa mukurwiswa nendege kweBritain paZeebrugge. Gare gare gore iroro, S18 akaendeswa kune imwe flotilla yekufambisa, uye musi waNovember 17, 1917, akanga ari chikamu chekufambisa kwezvikepe zvehondo zveGermany munguva yechipiri yeHeligoland Bight. uye pakupera kwehondo akanga achiri nhengo ye1st half-flotilla ye1st Escort Flotilla. 