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The weather conditions in tropical far North Queensland on Sunday, January 25, 1998 were ideal for a day out on the Great Barrier Reef.

It was hot and sunny with blue skies, and the glass-like water was still and clear.

Shortly after 8am, the 26 passengers who had booked a diving expedition with Charter Bo Company, Outer Edge Dive,

gathered at the Marina in Port Douglas, a quiet resort town located 65 kilometres from cans, the region's largest city.

Nine were certified divers, 11 were student divers, and six were day trippers.

All were excited to experience one of the seven natural wonders of the world and explore three of the 2900 individual coral reefs that stretched over the 344,000 square kilometre area.

Five crew members from Outer Edge Dive were overseeing the day's activities, including the business's co-owner Jeffrey Nann,

better known as Jack, who was acting as relieving skipper. The passengers were asked to store their shoes in racks by the dock to be collected upon their return, and at 8.30am, they boarded the MV outer edge to commence their journey.

They visited three different dive sites throughout the day, arriving at their final destination of St. Crispin Reef just after 2pm.

Located 38 nautical miles off the coast, on the eastern border of the Great Barrier Reef, St. Crispin is a popular diving and snorkeling spot.

It contains a spectacular abundance of marine life and coral formations, but with only four boatmourings, it is typically quiet.

Outer Edge Dive seldom visited the site, as it didn't offer much protection and was known for its chameleon-like quality, where the calm waters could quickly give way to fast-moving tides.

The visiting divers entered the sea at around 2.20pm, with the warm 29°C water leading some to forego their wetsuits in favour of swimsuits.

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