Largest flag unfurled underwater
Who
John Wood, Scott Hart, Roger Barton
What
166.62 square metre(s)
Where
Australia (Sydney)
When

The largest flag unfurled underwater measures 166.62 m² (1,793 ft² 70 in²), and was achieved by Roger Barton (UK), John Wood and Scott Hart (both Australia) in Sydney, New South Wales, Australia, on 5 December 2017.

All divers involved in the attempt used scuba diving equipment. The flag chosen to be unfurled was the Argentinian flag.