 Ramba uchinyora ndima iyi - Pakatanga Hondo Yenyika Yokutanga muna August 1914, Stephenson akanga ari muAdmiralty, akabatanidzwa kuNaval Intelligence Division. Zvisinei, nokukurumidza akakwanisa kuwana basa rokufamba nomugungwa somukuru mukuru we. Akanga achibatanidzwa mumibato muDardanelles, uye ipapo akatungamirira ngarava dzezvikepe zvomugungwa dzinotora mapurisa kubva kuKrete. Akaenderera mberi achiraira gunboat uye, seanoshanda kaputeni iyo Otranto Barrage, ngarava dzezvikepe zvidiki dzakaedza kudzora kubuda kweGungwa reAdriatic, kunyanya kuyedza kudzivirira ngarava dzepasi pemvura dzeAustro-Hungarian Navy kuti dzisapinda muMediterranean. Muchiitiko chokupedzisira ichi, akaitawo kuedza kwokutanga mukushandiswa kwema hydrophones kuti awane zvikepe zvepasi pemvura. Akataurwa muDespatches muna Zvita 1918, akagadzwa Companion yeOrder yeSt Michael neSt George mu1919 New Year Honours, akapihwa menduru yechiGreek yeCommander yeOrder yeMununuri nekuda kwebasa rake muMediterranean neAdriatic, uye akapihwawo United States Navy Distinguished Service Medal. 