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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.
The Passage Reef Shallow
Reef Dive | 
Boat access
Depth: 10 m (33 ft) to 15 m (49 ft)
Level: Open Water and beyond.
The Passage Reef Shallow is a boat dive site which lies in the Southern Ocean about 600 metres south-east of Point Danger, south-east of the city of Portland, on Victoria's Discovery Coast.
Diving at The Passage Reef Shallow
The Passage Reef Shallow is a boat dive site that can be easily overlooked, but it offers a vast array of interesting dive opportunities. The reef has plenty of interesting structure with plenty to see (both marine life and underwater scenery) on the right day. If you're a hunter gatherer, it's also a place where you can often grab a feed.
Location: Portland, Victoria 3305
Ideal Conditions: This dive site is very weather dependant. Best dived in good conditions with a low swell with light winds. See WillyWeather (Point Danger) as a guide for the tide times and the height of the tide.
Boat Launching: Access is by boat, taking about 15 minutes from the Portland Harbour, Lee Breakwater Road North Ramp or the Portland Harbour, Lee Breakwater Road South Ramp.
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Abalone Dive Site
© Mark Norman, Museum Victoria
Divers have the opportunity to catch Abalone at this dive site. Remember your catch bag, legal abalone tool, current Victorian Recreational Fishing Licence, and abalone measure. Please abide by all current fishing regulations if you intend to catch abalone.
See article-catching-abalone for practical abalone hunting advice from The Scuba Doctor, plus melbourne-abalone-dives for a list of other Abalone dive sites near Melbourne.
Crayfish Dive Site | © Ian Scholey
Divers have the opportunity to catch Southern Rock Lobster (aka Crayfish) at this dive site. Remember your catch bag, current Victorian Recreational Fishing Licence, rock lobster measure, and cray tags. Once you get back to the dive boat, or shore, make sure you clip the tail and tag your Crayfish as per Fisheries requirements. Please abide by all current fishing regulations if you intend to catch crays. See article-catching-crayfish for practical cray hunting advice from The Scuba Doctor, plus melbourne-cray-dives for a list of other crayfish dive sites near Melbourne. For tips on cooking your Crays, please see article-cooking-crayfish.
Gunditjmara country
Traditional Owners — This dive site is in the traditional Country of the Gunditjmara people of far south-western Victoria which continues over the state border into a small part of south-east South Australia and is bordered by the Glenelg River to the west and the Wannon River in the north. This truly ancient Country extends 100 metres out to sea from low tide and also includes Deen Maar (aka Lady Julia Percy Island) where the Gunditjmara believe the spirits of their dead travel to wait to be reborn. We wish to acknowledge the Gunditjmara as Traditional Owners. We pay respect to their Ancestors and their Elders, past, present and emerging.
The Passage Reef Shallow Location Map
Latitude: 38° 23.870′ S (38.397837° S / 38° 23′ 52.21″ S)
Longitude: 141° 39.250′ E (141.654166° E / 141° 39′ 15″ E)
Datum: WGS84 |
Google Map
Added: 2022-05-24 13:21:05 GMT, Last updated: 2022-05-24 13:36:36 GMT
Source: GPS
Nearest Neighbour: Little Reef, Portland , 514 m, bearing 58°, ENE
Portland, Discovery Coast.
Depth: 10 to 15 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.
![Halcyon Infinity 30lb System [SS Small Backplate]](/diveshop/images/halcyon/Halcyon-Evolve-Wing.jpg "Halcyon Infinity 30lb System [SS Small Backplate]")
