A Royal Australian Air Force (RAAF) P-3C Orion aircraft detected a suspicious signal Thursday in the vicinity of the ADV Ocean Shield.
Besides the search operation on the ocean surface, the underwater search also continued with the Ocean Shield at the northern end of the defined search area and Chinese ships Haixun 01 and HMS Echo at the southern end.
Two separate signals were detected Sunday by a US pinger locator being towed by the ADV Ocean Shield in the Indian Ocean search area, about 1,700 km northwest of Perth.
The first detection of the signal lasted for two hours and 20 minutes. After a few hours, the second signal was detected which lasted for 13 minutes.
