The Edge is a Passions of Paradise site at the southern end of Milln Reef, where the mooring lies along the reef margin. For divers it is a wall dive: a coral wall draped in life that drops away from the reef flat, where fish congregate in the current running along the edge. Snorkellers can stay on the reef flat above, which makes it a good site for mixed groups.

For advanced divers there is an extra option. Running away from the wall is a row of deep bommies the crew call the Pinnacles, and when the current is right the guides run it as a drift dive, travelling along the line of bommies with schools of barracuda and the resident sharks for company. The wall itself carries a dense cover of hard and soft corals, with fans and whips where the current is strongest.

Fusiliers, surgeonfish and snapper school in the water column, and trevally, reef sharks and occasionally larger pelagic fish patrol the edge. In the coral look for anemonefish, parrotfish, angelfish and butterflyfish, and for turtles resting on ledges. The neighbouring mooring, The Drop, is on the same southern end of the reef and is used in north winds.

The Edge suits confident Open Water divers on the wall, while the Pinnacles drift is better left to experienced or Advanced divers comfortable in current and with deploying a surface marker. Visibility is generally good because of the current flow. The site is typically part of a two-site day, paired with a sheltered mooring elsewhere on Milln.

Boat access only. Cairns day boats leave from the Reef Fleet Terminal (1 Spence Street) and the neighbouring Marlin Marina on the city waterfront, with check-in between about 7:00 and 8:00 am; most operators run transfers from city and northern-beaches accommodation, and there is paid parking near the terminal. The run of about 55 km out through Trinity Inlet and across the lagoon to Milln Reef takes around 76 minutes on a fast catamaran and noticeably longer on slower dive boats or into a south-easterly chop.

The Edge is a Passions of Paradise mooring at the southern end of Milln Reef. Enter from the stern steps; advanced divers may be dropped for a drift along the Pinnacles.

The prevailing south-east trade winds (typically 15-25 knots from April to September) are what limit Cairns outer-reef diving: above about 25 knots trips may be cancelled, and exposed eastern moorings are used only in light winds. Summer northerlies are gentler but make north-facing moorings choppy. Box jellyfish and Irukandji are present from about November to May (stinger suits on every dive), and the cyclone season runs November to April, when a system in the Coral Sea can close the reef for days.

Visibility drops after heavy rain and strong winds; spring is usually calmest and clearest. The Edge sits at the southern end of Milln and is exposed to a strong south-easterly; it is best in light winds or northerlies, and the Pinnacles drift is run only when the current is suitable.

Standard dive: descend to the wall at 12-15 m and follow it with the reef on one side, turn at a third of your gas and return shallower along the top of the wall. Advanced option: drift along the row of deep bommies known as the Pinnacles at 18-25 m with the guide, surfacing with a marker for pick-up.

Passions of Paradise – regular day-trip mooring on Milln; Silverswift – occasional; Milln is also worked daily by Silverswift and Passions of Paradise and on Pro Dive Cairns liveaboards; the mooring used on any day is chosen by the skipper according to wind, tide and other boats