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Hookah Harnesses


The hookah harness or a BCD keeps the air hose from getting in the diver's way when working underwater. Hookah harnesses are sometimes integrated with a weight belt, to counteract your body's natural buoyancy and make depth control easier.

The hookah harness typically has a backplate which is automatically positioned over the centre of the diver's back when the harness is worn. The backplate is often used to hold a bailout or emergency air source system. The backplate holds a check valve, which acts as a junction point for the air hose and the regulator. Since the air hose terminates at the diver's back, it prevents potential entanglements around the diver's body.

The regulator intake hose that attaches to the check valve prevents any pulling motion from the regulator while working underwater. For example, if a diver were moving around underwater and inadvertently came to the end of the air hose, the harness would absorb the shock and the regulator end would not be jerked from the diver's mouth.

The check valve that is found on the backplate performs a third very vital function. It acts as a safety gate by shutting down the air system, allowing the air to travel in only in one direction. Should a burst or leak occur in the airline somewhere between the output of the compressor and the input of the check valve, it could prevent a vacuum occurring in the mouthpiece of the regulator or cause a diver to breathe in a large amount of water that could cause panic.

Never, ever, dive without a hookah harness or BCD and a check valve!

Please read Introduction to Hookah Diving for more information about things you need to consider with a hookah diving setup.



The Abyss

Reef Dive Reef Dive | Boat access Boat access

Advanced Open Water Rated Crayfish Dive Site Deep Rated Inside Port Phillip Reef Dive Site Slack Water Subject to Shipping

Depth: 15 m (49 ft) to 40 m (131 ft)

The Abyss is located just inside Port Phillip Heads on the Point Nepean side. The wall here is 20 metres to 40 metres deep and faces north-east. Some distance off the wall lies a very large bommie over 100 metres east to west and perhaps 40 metres north to south.

This dive site is prone to strong currents and swells and can only be dived during slack water turning to a flood. Because of this, caution should be exercised on this dive but the scenery makes it well worthwhile.

The Rip & Tides Warning: Always keep an eye on sea conditions throughout any shore or boat dive within "The Rip" (aka "The Heads"). This is a dangerous stretch of water, where Bass Straight meets Port Phillip, which has claimed many ships and lives. Please read the warnings on the web page diving-the-rip before diving or snorkelling this site.

Crayfish Dive Site
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.

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.

 

The Abyss Location Map

Latitude: 38° 17.583′ S   (38.29305° S / 38° 17′ 34.98″ S)
Longitude: 144° 38.626′ E   (144.643767° E / 144° 38′ 37.56″ E)

Datum: WGS84 | Google Map
Added: 2012-07-22 09:00:00 GMT, Last updated: 2022-04-06 20:51:57 GMT
Source: GPS
Nearest Neighbour: Devils Drop Off, 58 m, bearing 127°, SE
Depth: 15 to 40 m.
Dive only on: SWF, SWE.



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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