On 6 October 2001, "Adelaide" was the ship which intercepted SIEV 4, the event which sparked the Children overboard affair. Under orders to prevent SIEVs from entering Australian waters, "Adelaide" attempted to warn the craft, carrying over 200 passengers (including children), against crossing from international waters during the night and into 7 October. When the SIEV failed to heed these warnings, "Adelaide" fired warning shots and initiated a RHIB boarding action, with the boarding party took control of the craft that afternoon. Between this time and when the craft was manoeuvred from Australian territory late the next morning, several attempts were made to sabotage the craft, and some adult passengers jumped or were thrown overboard while others threatened to do so; the fourteen people that entered the water were recovered by the frigate's RHIB and taken back to the SIEV. "Adelaide" observed the craft as it headed towards Indonesia, and moved in to provide further assistance a few hours later, after systematic sabotage immobilised the small vessel. "Adelaide" was instructed to take the vessel in tow and head for Christmas Island. The SIEV began to take on water during the afternoon of 8 October, and despite the appearance that the problem had been rectified, the craft sank without warning at 17:00. All aboard were forced into the water, and were rescued by personnel from "Adelaide". Reports of the sinking were conflated with information about those who jumped or were thrown overboard the day previous to give the impression that the threat of throwing children overboard had been made or carried out, a story that was later proven false but taken up at the time by the Howard government during the lead-up to the 2001 election to support their campaign promises to tighten border controls and immigration.