Jeff's Edge is an outer-reef wall near Lady Musgrave Island, dived as a drift at 8-22 m with visibility of 15-30 m. The operator describes a reef wall with overhangs, caves and crevices filled with abundant marine life, and significant water movement that makes it ideal for drifting. The current on the outer edge carries divers along the wall, allowing them to cover a long stretch of reef.

The overhangs and crevices shelter reef fish such as parrotfish and coral trout, and the open water along the edge brings whitetip, blacktip and grey reef sharks, eagle, sting and bull rays, sea turtles and pelagic fish. Patches of turtle weed grow on the reef, and hard and soft corals cover the wall. Like all of Lady Musgrave Experience's outer-reef sites, it is run as a guided drift from the custom dive tender Underworld: a divemaster leads a free descent, the group drifts with the current, and the skipper follows to collect everyone after a free ascent.

Divers need Open Water certification and recent experience, and book through the Adventure Outer Reef Double Dive or an overnight pontoon package. The caves and crevices are features to look into as you pass, not penetration dives; they are best appreciated with a torch to bring out the colours of the sponges and soft corals in their shade. Jeff's Edge suits Open Water divers who are comfortable in current, and it is a good option for photographers because the wall provides both structure and background for sharks and rays passing in the blue.

As with other Lady Musgrave outer sites, the choice of Jeff's Edge on a particular day depends on wind and tide, so be flexible.

Lady Musgrave Island is about 96 km north-east of Bundaberg and 59 km east of the Town of 1770. Lady Musgrave Experience departs 15-17 Marina Drive, Burnett Heads (15 minutes' drive from Bundaberg; parking at the marina) at about 7:30 am for a roughly 2-hour crossing to its pontoon in the lagoon; 1770 Reef Eco Tours leaves the 1770 Marina (free parking beside the marina cafe) for a roughly 90-minute run. Private vessels anchor inside the lagoon via the marked entrance channel through the reef.

Certified divers transfer from the pontoon to the dive tender Underworld for the short run outside the lagoon to the outer-reef drift sites; the site used on the day depends on wind and tide.

The lagoon itself is diveable in almost any weather, but the crossing is open ocean and tours are cancelled when south-easterly trade winds exceed about 25 knots or the swell is over 2.5 m. Outer-reef drift sites are chosen by wind and tide: the northern and western edges shelter from south-easterlies, the southern ledges need light winds or northerlies. Currents strengthen on spring tides and the outer sites are run as drifts on either the flood or ebb.

Cyclone season is November-April; summer storms and plankton reduce visibility. Calmest seas are often September-November and March-April. Outer-reef drift sites are dived on whichever edge is sheltered; the current that makes them good drifts is strongest on spring tides.

Giant-stride from the tender Underworld at the up-current end, make a free descent with the divemaster to the reef edge and drift with the current along the wall or bommie line at the depth set in the briefing. Stay together behind the guide, check under overhangs and in the blue as you go, and ascend with the group for a free-ascent safety stop under the guide's SMB; the tender follows and collects the group.

Lady Musgrave Experience runs daily tours from Burnett Heads (Bundaberg) aboard Reef Empress to its Lady Musgrave HQ pontoon, with certified divers transferring to the dive tender Underworld for the 'Adventure Outer Reef Double Dive'; overnight stays on the pontoon allow extra and night dives. 1770 Reef Eco Tours also dives Lady Musgrave from the Town of 1770.