Star Tiger (registration G-AHNP) was an Avro Tudor IV passenger aircraft owned and operated by British South American Airways (BSAA) which disappeared without a trace over the Atlantic Ocean while on a flight between Santa Maria in the Azores and Bermuda in the early morning of 30 January 1948.

The loss of the aircraft, along with that of BSAA Avro Tudor Star Ariel in 1949, remains unsolved, with the resulting speculation helping to develop the Bermuda Triangle legend.

The airline operated mostly Avro aircraft: Yorks, Lancastrians and Tudors, and flew to Bermuda, the West Indies and the western coast of South America.

On the morning of 28 January 1948, the crew and passengers boarded Star Tiger at Lisbon only to be forced to return to the airport waiting room when the pilot, Captain Brian W. McMillan, told them that the port inner engine needed some attention.

[5] At 03:00, Captain Griffin aboard the Lancastrian amended his ETA from 03:56 to 05:00, and called Star Tiger to say that he was switching to voice telephony to contact Bermuda Approach Control.

Griffin later testified that he heard nothing from Star Tiger to indicate that it was in trouble and that from then until he touched down at 04:11 his own aircraft encountered no turbulence, icing, fog or electrical storms.

Twenty-six aircraft flew 882 hours in total and surface craft also conducted a search, but no signs of Star Tiger or her 31 passengers and crew were ever found.

[9] As soon as it was learned that the Star Tiger had been lost, BSAA's remaining Avro Tudors were grounded by Britain's Minister of Civil Aviation.

They were permitted to carry cargo rather than passengers a few weeks later, but had to fly from Santa Maria to Bermuda via Newfoundland, a diversion that reduced the longest overwater leg by 250 mi (400 km).

[citation needed] Lord Macmillan was appointed to head the investigation, assisted by two assessors in the form of a professor of aviation from the University of London and the chief pilot of British European Airways.

The report emphasised that the crew of the Star Tiger were highly experienced, and found "want of care and attention to detail" in the flight plan, but nothing serious enough to explain the accident.

[10] The inquiry reported in conclusion: "...In the complete absence of any reliable evidence as to either the nature or the cause of the accident of Star Tiger the Court has not been able to do more than suggest possibilities, none of which reaches the level even of probability.

Having received an accurate bearing, McMillan's task of making landfall was not in itself difficult, except that he was acutely aware of the fact that there was no alternative airport: the nearest point on the American mainland was Cape Hatteras, 580 mi (930 km) to the west, and well beyond the Star Tiger's range.

The altitude chosen by the Star Tiger and the Lancastrian was much lower than usual, and no previous BSAA flight had flown so low for so long.