Warning

Every time we sell a manifold or switch block, we shudder a little bit. The gas switch block is used in primarily by hookah surface supply divers to switch from surface supply to emergency bailout gas. Manifolds are primarily used in gas distribution systems. But the key here is that there are not different gas mixtures involved.

Unfortunately divers sometimes get the idea to match these products up with multiple cylinders and/or or quick disconnects to create some type of elaborate system for rapid switching between different gas mixtures and/or cylinders. Gas switching errors are very often involved in technical diving accidents. Over the years we've learned about several near misses and fatalities that were directly attributable to mistakes with switch blocks that were connected to different gas mixtures. No matter how careful the diver, or how many safeguards, we think using switch blocks with different mixtures is a very bad idea.

Gull Island

Reef Dive | Boat access

Depth: 6 m (20 ft) to 8 m (26 ft)

Gull Island | © Unknown

Gull Island (aka Bird Rock) is located on the eastern side of Phillip Island near Cape Woolamai. It is a large rocky outcrop situated in a bay normally sheltered from adverse south-westerly weather. It features small crevices and overhangs with some colourful corals, sponges and zooanthids. Wrasse, Leatherjackets, Morwong, Port Jackson Sharks and Conger Eels live in the crevices amongst the weed.

See WillyWeather (Gull Island) as a guide for the tide times and the height of the tide.

Bass Strait Warning: Always keep an eye on sea conditions throughout any shore or boat dive in Bass Strait on Victoria's coastline. Please read the warnings on the web page diving-in-bass-strait before diving or snorkelling this site.

Boon Wurrung / Bunurong country

Traditional Owners — This dive site is in the traditional Country of the Boon Wurrung / Bunurong people of the Kulin Nation. This truly ancient Country includes parts of Port Phillip, from the Werribee River in the north-west, down to Wilson's Promontory in the south-east, including the Mornington Peninsula, French Island and Phillip Island, plus Western Port. We wish to acknowledge the Boon Wurrung as Traditional Owners. We pay respect to their Ancestors and their Elders, past, present and emerging. We acknowledge Bunjil the Creator Spirit of this beautiful land, who travels as an eagle, and Waarn, who protects the waterways and travels as a crow, and thank them for continuing to watch over this Country today and beyond.

Gull Island Location Map

Latitude: 38° 33.598′ S (38.559963° S / 38° 33′ 35.87″ S)
Longitude: 145° 21.603′ E (145.360042° E / 145° 21′ 36.15″ E)
Datum: WGS84 | Google Map
Added: 2019-06-07 02:13:08 GMT, Last updated: 2022-03-12 02:49:38 GMT
Source: Google Earth
Nearest Neighbour: Cape Woolamai Reef, 797 m, bearing 185°, S
Phillip Island.
Depth: 6 to 8 m.

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DISCLAIMER: No claim is made by The Scuba Doctor as to the accuracy of the dive site coordinates listed here. Should anyone decide to use these GPS marks to locate and dive on a site, they do so entirely at their own risk. Always verify against other sources.

The marks come from numerous sources including commercial operators, independent dive clubs, reference works, and active divers. Some are known to be accurate, while others may not be. Some GPS marks may even have come from maps using the AGD66 datum, and thus may need be converted to the WGS84 datum. To distinguish between the possible accuracy of the dive site marks, we've tried to give each mark a source of GPS, Google Earth, or unknown.