On 2 November, "Tiru" got underway for Subic Bay, Philippine Islands. One day out, the submarine ran aground on Frederick Reef. For two anxious days and nights, "Tiru" attempted to extricate herself from the predicament by backing off under her own power, but to no avail. On 6 November, civilian tugboat "Carlock" and Australian destroyer came to the rescue, arriving on the scene and commencing salvage operations under the direction of a 7th Fleet salvage officer. Returning to Brisbane, "Tiru" was drydocked at South Brisbane Dockyard for emergency repairs and damage estimates.