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Emergency Air Systems

In an out of air emergency there are really only two things that matter — your next breath, and where it's coming from. An emergency air system (bailout bottle, bailout cylinder or emergency gas supply) is a scuba cylinder carried by a scuba diver for use as an emergency supply of breathing gas in the event of a primary gas supply failure. Some also call this a redundant air source.

Choosing among the available emergency air systems is an exercise in trade-offs. Small, compact bailout cylinders are easy to travel with, easy to use, easy to share and they can be stowed almost anywhere. But depending on how deep you are, they may only give you just enough air to kick for the surface or to find that wayward buddy. Bigger emergency air cylinder systems provide more options in that they may allow you to make a slower ascent, but they also take up more space on your gear, are harder to travel with and can create hydrodynamic drag.

The Scuba Doctor dive shop can supply the H2Odyssey Extra Air Source kit solutions, or help you to build a different setup to suit your particular requirements. Maybe you're a hookah diver needing a backup air source, a recreational diver going deeper on a single cylinder and wanting an out of air emergency solution, or a solo diver who needs a redundant air source to stay safe. Whatever you need, we can help you to achieve it.

Firefly Aircraft 3

Wreck Dive Wreck Dive | Boat access Boat access

Inside Port Phillip Wreck Dive Site

Fairey Firefly Aircraft | Max Depth: 18 m (59 ft)

Level: Open Water and beyond.

A RAN Fairey Firefly
A RAN Fairey Firefly
© Royal Australian Navy

On 20 July 1947 this Fairey Firefly Second World War-era, carrier-borne, fighter aircraft crashed into the sea off Frankston, Victoria as the result of a collision between another Fairy Firefly at 1500 feet.

See also, Wikipedia: Fairey Firefly,
Heritage Council of Victoria: Fairey Firefly Aircraft - Frankston, and
Australian National Shipwreck Database: Frankston - Fairey Firefly.

Fairey Firefly Aircraft — Frankston

We have the GPS marks and details for what might be two or three Fairey Firefly Aircraft wreck sites near Frankston on the eastern side of Port Phillip.

Firefly Aircraft 1
Latitude: 38° 6.004′ S   (38.100067° S / 38° 6′ 0.24″ S)
Longitude: 145° 0.714′ E   (145.0119° E / 145° 0′ 42.84″ E)

Firefly Aircraft 2
Latitude: 38° 5.980′ S   (38.099667° S / 38° 5′ 58.8″ S)
Longitude: 145° 0.692′ E   (145.011533° E / 145° 0′ 41.52″ E)

Firefly Aircraft 3
Latitude: 38° 6.091′ S   (38.101517° S / 38° 6′ 5.46″ S)
Longitude: 145° 0.627′ E   (145.01045° E / 145° 0′ 37.62″ E)

Fairey Firefly Aircraft — Frankston

The GPS marks for the Firefly Aircraft 1 and Firefly Aircraft 2 are 50 metres apart. It might be two separate aircraft, or the broken up and separated parts of a single aircraft. We simply don't know.

The GPS marks for the Firefly Aircraft 1 and Firefly Aircraft 3 are 205 metres apart.

If you have further information about these aircraft wreck sites, please contact us.

Heritage Warning: Any shipwreck or shipwreck relic that is 75 years or older is protected by legislation. Other items of maritime heritage 75 years or older are also protected by legislation. Activities such as digging for bottles, coins or other artefacts that involve the disturbance of archaeological sites may be in breach of the legislation, and penalties may apply. The legislation requires the mandatory reporting to Heritage Victoria as soon as practicable of any archaeological site that is identified. See Maritime heritage. Anyone with information about looting or stolen artefacts should call Heritage Victoria on (03) 7022 6390, or send an email to

Boon Wurrung / Bunurong country
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.


Firefly Aircraft 3 Location Map

Latitude: 38° 6.091′ S   (38.101517° S / 38° 6′ 5.46″ S)
Longitude: 145° 0.627′ E   (145.01045° E / 145° 0′ 37.62″ E)

Datum: WGS84 | Google Map
Added: 2012-07-22 09:00:00 GMT, Last updated: 2022-04-25 09:27:56 GMT
Source: GPS
Nearest Neighbour: Firefly Aircraft 1, 205 m, bearing 38°, NE
Fairey Firefly Aircraft.
Crashed: 20 July 1947.
Depth: 18 m.

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.


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