Michael McFadyen's Scuba Diving Web Site
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About Me
My Diving
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St George Scuba Club
Some of my Best Photos
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Dive Sites
Sydney Reef Dive Sites
Sydney Shipwrecks
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Kelly Talking on ABC Sydney about Shipwrecks
NSW Dive Sites
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Australian Dive Sites
Overseas Dive Sites
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Old Bottles
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Dive Related Equipment
Shearwater Predator and Heinrichs Weikamp OSTC 2N
Uwatec Aladin Dive Computers
Apollo AV1 Underwater Scooter
Bauer Compressor
DIY Oxygen Stick - Nitrox
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My Camera Setup
Purchase of New Dive Boat
My Dive Boat - Mak Cat
My Old Dive Boat - Le Scat
My Dive Gear
GPS and Diving
Make Your Own Car Tank Rack

Marine Life
Rarer Sydney Marine Life
Bare Island Pygmy Pipe Horses
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Bare Island Marine Life
Encounter with Southern Right Whale and Calf

Other Dive Info
How Weather Affects Diving in Sydney
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Tide Tables
Dive Accidents and Incidents
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Noel Hitchins 1951-2005
Lloyd Bridges - Mike Nelson in Sea Hunt
My Yachting Adventures
Below is a list of links to the main pages about my yacht, Catlypso and My Yachting Adventures:
  • Purchase of Catlypso
  • Details about Catlypso
  • Cleaning/Repairing Catlypso
  • My Yachting Adventures.
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    Michael's 4WD Trips
    Click here for a list of my Four Wheel Drive and Camping Trips.
    Home Brewing
    Click here for an article about Home Brewing.
    Sydney Dive Site Hints
    "The Wanderers at 43 m is Sydney's deepest reef dive"
    The area to the west of Kavieng in New Ireland Province in Papua New Guinea has numerous channels that provide some excellent diving. Originally for this dive we had planned to do a site called Helmuts Reef at the month of Steffen Strait but the current there was way too strong. The alternative site was Matrix.

    Kelly and a gorgonia at MatrixAnother very colourful gorgonia

    Matrix is also located in Steffen Strait, but is about 4.5 kilometres from the mouth of the strait. It is about 40 minutes from Nusa Resort on the fast (43 km.h) dive boats. Even though the tide was incoming at the entrance, the tide here was outgoing. It appears that the water was flowing in in the centre of the strait but swirling around and going out on the western side. This meant that we had to do a drift from about 300 metres further up back to the normal starting point of GPS S2Âș 38' 39.0" E150Âș 31' 59.3" using WGS84 as datum. This spot is easily found as it is the only spot along the western side of the channel where the reef is broken and the deeper water extends to the west.

    Looking out of the cave at MatrixKelly with a very large gorgonia

    As mentioned, we travelled about 300 metres further up Steffen Strait and entered the water. Here the depth was xx metres and the reef a vertical wall. The current is relatively strong, but you could swim against if with not too much effort. This wall is almost totally covered in gorgonias, some of them very large. There are also some sea whips. The reef goes to at least 50 metres.

    A few bump-headed parrotfish were seen, both early in the dive and towards the end. A few sharks and a turtle were also seen. The wall has a lot of small caves, some of which can be entered. There are also a few swim-throughs created by bommies linking up with the main reef.

    Two Tryon's Risbecia - Risbecia tryoniRacing Stripe Flatworm (yes, that is its name)
    - Pseudoceros bifurcus

    After 30 minutes the number of gorgonias diminished. Of course, as you go you are gradually ascending all the dive. By the time we get back to the intended starting point (a small indent in the reef top), the current has started to swirl a bit and there is a bit of an eddy effect.

    The indent is obvious once we get there so we spend the rest of the time in the shallows of the reef till it is time to ascend. We did a 70 minute dive, thoroughly enjoyable and very easy. Once it is time to ascend, we swam out from the reef and started heading back in the direction we had come from. On the surface you just wait for the boat to come and get you.

    An interesting starfishTwo blennies on a brain coral

    Visibility is 30 metres and the water temperature 19ÂșC.

    Copyright © Michael McFadyen 1990 to 2023
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    This web site has been wholly thought up, designed, constructed and funded for over 25 years by Michael McFadyen
    without any help from the Australian Dive Industry since 1996!