 Nyorai kupfuurira kweiyi ndima - Akaiswa pasi munaJanuary 1931 paBath, Maine ngarava yeBath Iron Works uye yakatangwa musi wa 28 November 1931 imwe ye 18 Thetis-class patrol boats. Yakagadzwa musi wa 21 December 1931. Akanga mumwe zvikepe mangwanani nechepakati 1941 akasimbisa Alaska Sector colloquially kuzivikanwa se Alaskan Navy pamusoro rechi13 Naval District pasi Captain Ralph C. Parker. Mukati mokurwisa kweJapan Zvitsuwa zveAleutianMuna June 1942, akashanda sechikamu cheTask Force 8 pasi peRear Admiral Robert A. Theobald, Mutungamiriri weNorth Pacific Force, akapiwa basa rekudzivirira Alaska kubva pakurwiswa kweJapan. Aiva chikamu Task Group 8.2 the Surface Search Group rinoumbwa patrol ngarava Parker kuti rengarava: mureza wake, ari gunboat ; 5 Cutters Aurora,,, Cyane, uye Bonham; 14 YP patrol ngarava; uye yekare gungwa tugboat . TG 8.2 yaifanira kugadza mutsara wokurinda kuti aratidze kusvika kwechiJapan. Pikicha yavo yakawedzerwa nendege kubva kuAir Search Group inosanganisira makumi maviri PBY Catalina mabhodhi anobhururuka anoshanda ne seaplane tenders,, uye uye imwe yepasi-yakavakirwa B-17 Flying Fortress bhomba. 