This expedition includes 3 days (weather depending) at remote Osprey Reef which offers incredible visibility and 1000 metre deep coral walls. At North Horn, Osprey Reef, where the currents meet, we'll see large schools of tuna, barracuda and plenty of sharks - white tips, grey and silver tip whalers, leopard sharks, thresher sharks and schooling hammerheads. This is exhilarating diving with the shark experts and the adventure will include shark attraction diving with often 25 sharks in the water with you.

You'll also enjoy the contrast of 3 days diving the Ribbon Reefs of the Great Barrier Reef. There's many varied dive sites featuring the diversity of coral gardens, the overwhelming fish life of the pinnacles, and diving the world famous Cod Hole.

Through years of experience and research, we are proud to offer you the ultimate 'inwater' whale encounter. On these expeditions you will swim with magnificent Dwarf Minke Whales, and have the added bonus of diving the northern Great Barrier Reef.

It is very hard to describe the experience of being in the water, when a five ton whale approaches you as close as a metre away! Encounters may be with one to twenty whales at one time. The excitement of being part of the Undersea Explorer team, where the research enhances the guests experience and ensures that all activities are eco-friendly and sustainable, is unique . In fact the International Whale Commission has cited our operation as a best practice case study for in-water whale tourism.

This expedition features 6 days diving the Ribbon Reefs of the Great Barrier Reef. There's many varied dive sites featuring the diversity of coral gardens, the overwhelming fish life of the pinnacles, and diving the world famous Cod Hole.

Expeditions to Great Detached Reef, Raine Island, Mantis Reef and Wreck Bay near the top of Australia.

Travelling to the Far Northern regions of the Great Barrier Reef will always be the pinnacle of extreme adventure diving. Australia's spring is the best time to dive the outer walls, offering a great chance of encounters with megafauna - Brydes Whales, Manta Rays and Whale Sharks are all regular visitors to this region. A dive at Raine Island Reef at dawn or dusk in the middle of a "turtle highway" is simply awesome! Raine Island can have up to 11,000 green turtles nesting on the coral cay each night, and our divers are diving at a time when the turtles are moving to or from the beach. Added to this the excitement of seeing turtle predators such as the Tiger Shark, and your adventure diving experience is complete!

Your panoramic flight to or from Lockhart River gives you the opportunity to view the vast wilderness of the Cape York coastline and reefs.

Extreme weather may cause cancellation or adjustment to the advertised itinerary. We fully expect to honor all bookings, however, we reserve the right to cancel at any time prior to departure. In the event a trip is cancelled, alternative arrangements will be offered. If these are unacceptable all monies will be refunded. If the weather is unsuitable we reserve the right to shorten or cancel a trip, change itinerary or substitute a vessel, and any refund would be based on the number of days cancelled, not the quality or quantity of dives.

Whole boat charter and group numbers are reassessed 6 months prior to departure, and also at this time a rooming list is required.