Michael McFadyen's Scuba Diving Web Site
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About Me
My Diving
Web Links - Dive Clubs
St George Scuba Club
Some of my Best Photos
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Dive Sites
Sydney Reef Dive Sites
Sydney Shipwrecks
Sydney Dive Visibility, Swell and Temps
Kelly Talking on ABC Sydney about Shipwrecks
NSW Dive Sites
Sydney Shipwreck Summary
NSW Shipwreck GPS/Marks
Australian Dive Sites
Overseas Dive Sites
Aircraft I have Dived
Old Bottles
Free Shipwreck Books

Dive Related Equipment
Shearwater Predator and Heinrichs Weikamp OSTC 2N
Uwatec Aladin Dive Computers
Apollo AV1 Underwater Scooter
Bauer Compressor
DIY Oxygen Stick - Nitrox
GoPro HD Hero Video Camera
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
Bare Island Sea Horses
Bare Island Nudibranchs
Bare Island Marine Life
Encounter with Southern Right Whale and Calf

Other Dive Info
How Weather Affects Diving in Sydney
Visibility and Wave Averages in Sydney
Waves and Diving
Diving Weather and Sea Conditions
Tide Tables
Dive Accidents and Incidents
Dive Book Reviews
Site Map
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
    "Shiprock is a fantastic dive with prolific fishlife at most times"
    Twin Bommies
    This is the most popular dive site in Port Vila, Vanuatu. It is located out past Iririki Island and past Ifira Island. The site consists, not unexpectedly, of two coral bommies that sit on the top of a flatish reef. To the north it slopes off deeper.

    There are a couple of moorings at this site, one owned by each of the dive operators. The Nautilus mooring is located at GPS S17° 45' 25.7" E168° 16' 55.0" using WGS84 as a datum. This mooring is located on the south side of a gutter that runs west-east. This gutter has broken coral on the bottom. It is about 12 metres here.

    Twin BommiesTwin Bommies
    The wall at Twin BommiesI think this is an elegant phyllidia - Phyllidia elegans

    From the mooring, you head north and go up over a slight ridge and then drop back to 12 metres. After about seven minutes you will come to the drop-off. Here the reef slopes fairly steeply to about 30 metres or so. It is only worth going to about 25 metres. Turn right once you reach this spot and head east. You can gradually drop from 12 metres to 22 metres.

    At first, the reef has a steep slope to the north but after about 50 metres there is a shear wall. This turns a bit to the south-east. Along this section of the reef there are a couple of small indents. These can have a lot of fish. There are some small gorgonias, lots of small coral outcrops and some sea whips. There are also some interesting fish, including titan triggerfish, along here. You will also see some bannerfish and butterflyfish.

    Twin BommiesTwin Bommies
    The Twin BommiesA goby on a sea whip

    The reef turns to the south near here. You go up over the wall and soon come to the Twin Bommies. The depth rises to 20 metres and then gradually to 15 metres. The Twin Bommies are two coral bommies that rise up about three or four metres from the bottom. They are not huge, only about five metres in diameter.

    The area around and between the bommies has a lot of fishlife. The southern side of the eastern bommie has a huge amount of fish. You can spend a lot of time around the bommies. There can also be crayfish under the bommies.

    Twin BommiesTwin Bommies
    Kelly with a very friendly Clarks anemonefishA shrimp on an anemone

    There are also a few anemones between the wall and the bommies. Some of these have the friendliest Clarks anemonefish (clownfish) you will ever come across. There are also clear shrimp in some of the anemones.

    Once you have finished with this area, you head west and soon come to the mooring. You can spend any remaining time in this area before ascending. On one dive here, we saw a couple of crocodilefish in this general area. Amazing looking fish!

    Black and White NudiYellow fish
    A couple of photos of the crocodilefish we saw just west of Twin Bommies

    This is quite a good dive site. Visibility is normally about 20 metres and water temperature between 26°C and 28°C. It is well worth doing once on your trip to Port Vila.

    Copyright © Michael McFadyen 1990 to 2024
    Non-commercial use of an article or photograph is permitted with appropriate URL reference to this site.
    Dive shops, dive operators, publications and government departments cannot use anything without first seeking and receiving approval from Michael McFadyen.
    This web site has been wholly thought up, designed, constructed and funded for almost 30 years by Michael McFadyen without any help from the Australian Dive Industry.
    Website created 1996!