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MIFLEX Hoses / Accessories

Are Double-Braided Flex Hoses Better Than Rubber?

YES! After generations of rubber as the status quo in scuba hoses, technology has finally been used to improve this important product used by every diver. Every aspect of the double-braided polyester hoses out perform rubber hoses. Double-braided is much more flexible, at least a third lighter, much more durable, kink resistant and enormously stronger. Recent updates with high-pressure fittings have addressed the early issues and these too are now better than found on rubber hoses. The only issue remaining has been price, and now even that has reached parity or better at The Scuba Doctor.

Only a handful of companies have the technology to make double-braided polyester hoses, although these same hoses are sold under a variety of different names. The Scuba Doctor sells the Italian made, premium quality, Miflex brand.

The Miflex Carbon HD and Miflex Xtreme-hi + ranges of high pressure gauge hoses bring clear benefits when compared to traditional HP hoses to better suit the majority of divers requirements. Slim-line and Lightweight design, approximately 60% lighter than traditional HP hoses with a burst pressure in excess of 2,000 bar (29,000 psi).

Miflex Xtreme Low Pressure Regulator hoses and Miflex Xtreme LP BCD/Inflator hoses feature an external nylon safety braiding designed to resist the snags and abrasions that divers can often encounter. The patent-pending Miflex Xtreme double braiding also resists UV rays out of the water, thus extending the lifespan of the hose.

Unlike traditional hoses, the Miflex Xtreme nylon safety braiding is not simply pushed over the hose fittings. Instead the braiding is tightly bound and fixed to the hose core by stainless steel or brass sleeves.

Each Miflex Xtreme Low Pressure Regulator hose comes standard with 3/8" Male and standard UNF 9/16" Female connections. The Miflex Jacket/BCD/Inflator hose comes standard with 3/8" Male and quick release coupler fittings.

All Miflex hoses come in a Water Resistant Document Wallet, and are Oxygen Cleaned from the factory.

As a related business imports and distributes the Miflex range of diving hoses in Australia, we know these hoses better than anyone else in the region.

Tech Tip: Dive Hose Life

In our experience double-braided polyester diving hoses are more reliable than rubber hoses, but keep in mind that all SCUBA hoses, both rubber or polyester, will fail sooner or later either due to age, storage conditions or handling.

Do not allow hoses to receive prolonged exposure sunlight, as the heat and UV from strong sunlight will significantly shorten the life of the hose. Do not attempt to flush the inside of the hose with any form of solvent or other chemical. New hoses are factory clean and if you have any reason to think they are no longer clean then the hose should be replaced.

Prior to every dive trip you should always pressurise and inspect your hoses for mechanical damage, corroded fittings, bulges and leaks. For more information about the care and maintenance of your dive hoses, please see Caring For Scuba Diving Hoses.

The Scuba Doctor suggests replacing all SCUBA hoses every five years or 500 dives, whichever comes first.


Wreck Dive Wreck Dive | Shore access Shore access

Ideal For Snorkelling Inside Port Phillip Marine Park - No Fishing Night Dive Site Open Water Rated Wreck Dive Site

Wooden Lighter | Max Depth: 4 m (13 ft)

Level: Open Water and beyond.

The Carmen shipwreck is significant as an ex-French sealing and whaling relief vessel which carried a variety of cargoes around the world. It's recreationally significant for the remains of its hull fittings in Jawbone Marine National Park, as one of at least six known vessels abandoned in this area.

Diving and Snorkelling the Carmen Shipwreck

Source: State Library Victoria

The Carmen shipwreck can be reached by swimming around The Jawbone on the western side of Jawbone Bay at Williamstown and following the reef, passing the southern extremity of the peninsula before heading north-west. There on the edge of the reef, in about 4 metres of water are the remains of the Carmen. The site can be easily visited by snorkellers.

As a result of the Carmen wreck being on a bluestone reef and subject to southerly winds, not much timber structure has survived. It's right where the reef meets the sand on the western side of The Jawbone. There is part of the sternpost and rudder, and interspersed amongst the rocks are a number of bronze bolts and iron knees. It is spread out over a distance of 34 metres or so.

The majority of the wreck consists of iron knees, crutches and staples of various types scattered on and along the edge of the reef.

Carmen Shipwreck History — Built in 1879

Carmen and Helen Hulks
Carmen and Helen Hulks
© State Library South Australia

The Carmen was built in 1879 by N. Martinolich in Lussinpiccolo, Austria as a wooden sailing brigantine. The Carmen had an overall length of approximately 104 ft (32 m), beam 24.5 ft (7.47 m) and draught 13.5 ft (4.11 m).

The Carmen was an ex-French sealing brigantine, formerly employed as a whaling relief vessel. Originally named as the Ribes and later named Anna, Marthe, Sainte and Maurice. As a Norwegian whaling relief ship in the Antarctic she brought oil to Melbourne and Hobart.

In 1909 the Carmen brought to Melbourne, 50-tuns of sea elephant oil from the Kerguelen Islands. A short time later the Carmen was purchased and renovated by the Carmen Shipping Co for use in the Tasmanian timber trade.

In 1912, whilst on a voyage from Sydney to Hobart, and when off Montague Island, the Carmen lost its masts in a storm. It was taken in tow by the steamer Wee Clyde whereby they made their way back to Sydney. Later that year it was sold to ship owners McIllwraith & McEacharn and towed to Melbourne to be converted into a coal hulk/lighter for the company. There it operated as a lighter for the next 24 years. As a lighter the Carmen would transfer various cargoes to or from one of Melbourne's wharves to larger ships which could not travel all the way to those wharves, or to other places in Port Phillip.

Carmen Sinking — 10 February 1936

On Monday 10 February 1936 in what could only be described as a brazen act, the owners of the Ester and Carmen (having no further use for these vessels) decided as a means of disposal, and without any authority to do so, to run both lighters ashore off the Williamstown Rifle Range in Port Phillip, and set them on fire.

On Saturday 15 February 1936, the Williamstown Chronicle describes the end of the Carmen, and the Ester:

"Burning from stem to stern, two lighters, veterans of the days of sail, were burnt last Monday off the Williamstown rifle range. They are the Victorian Lighterage Co's Ester and Carmen. The manager of the company (Mr Treacy) set fire to the vessels on Monday afternoon. Formerly a three masted barque, the Ester was built in Scandinavia for shipping timber to Australia. Of 400 tons, she was 35 years old and had been trading between Melbourne and Geelong for 20 years. The Carmen, a brigantine, was built in Italy 55 years ago. As a Norwegian whaling relief ship in the Antarctic she brought oil to Melbourne and Hobart. For 20 years she traded in the Bay."

See also, MAAV: Carmen 1879-1936,
Heritage Council Victoria: Carmen, and
Australian National Shipwreck Database: Carmen.

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

Finding the Carmen Shipwreck

As of 10 February 2021 we're using a GPS mark for the Carmen from Peter Taylor:
Latitude: 37° 51.992′ S   (37.86653333° S / 37° 51′ 59.52″ S)
Longitude: 144° 52.542′ E   (144.8757° E / 144° 52′ 32.52″ E)

We were previously using:
Latitude: 37° 53.160′ S   (37.886° S / 37° 53′ 9.6″ S)
Longitude: 144° 54.340′ E   (144.905667° E / 144° 54′ 20.4″ E)

3,406 m, bearing 129°, SE

Jawbone Marine Sanctuary

Wreckage at Jawbone
Wreckage at Jawbone | © Phil Watson

This site is located within the Jawbone Marine Sanctuary, which is the most northern marine sanctuary in Port Phillip. Jawbone Marine Sanctuary, named after its shape, is located in Williamstown and protects 30ha of coastal waters. The little promontory, west of the beach at Williamstown, has been fenced off from the rest of the world for over 80 years by a coastal rifle range. This unspoiled place is now considered a haven for coastal and marine life right next to Melbourne. It is a great scenic place for children to play too.

The Jawbone Marine Sanctuary begins west of the fishing clubs in Bayview Street, Willamstown, and runs west 1.9 km along the foreshore around the Jawbone to wader beach south of McGuire Crescent. It abuts the Jawbone Flora and Fauna reserve and extends from the high water mark to a maximum of 300 metres offshore.

The sites for diving and snorkelling within the Jawbone Marine Sanctuary are:

Aboriginal tradition indicates that the sanctuary is part of Country of Boon Wurrung people.

More protected than many sites in the area, so a good site to dive instead when the wind is up a bit. There are many spots to dive here in all directions.

Jawbone Wrecks

The sanctuary was used as a scuttling ground for ships that had outlived their usefulness. The exposed location, rocky bottom, proximity to Williamstown and restricted public access made it an ideal place to scuttle wrecks.

Along the west edge of Jawbone are the remnants of some shipwrecks including: Agnes, Carmen, Ester, Macedon, and Salsette. The Kakariki, Orange Grove, and Baldrock also lie nearby, plus there are other unidentified wrecks.

Also not far from Jawbone are the remains of a Vultee Vengeance Aircraft.

Jawbone Bathymetry
Jawbone Bathymetry
Source: Parks Victoria

See also Park Note: Jawbone Marine Sanctuary,
Parks Victoria: Jawbone Marine Sanctuary,
Jawbone Marine Sanctuary Care Group,
Taxonomic Toolkit for the Marine Life of Port Phillip Bay, and
How To Assess Visibility Before Heading To Snorkel Sites In Port Phillip / Western Port — by Simon Mustoe, 20 January 2022.

Jawbone Marine Sanctuary Map
Jawbone Marine Sanctuary Map | Source: Parks Victoria
Jawbone Map
Jawbone Map | © Parks Victoria

You are not permitted to carry a spear gun while snorkelling or scuba diving in Jawbone Marine Sanctuary.

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.


Carmen Location Map

Latitude: 37° 51.992′ S   (37.866533° S / 37° 51′ 59.52″ S)
Longitude: 144° 52.542′ E   (144.8757° E / 144° 52′ 32.52″ E)

Datum: WGS84 | Google Map | Get directions
Added: 2012-07-22 09:00:00 GMT, Last updated: 2022-05-02 06:39:48 GMT
Source: Peter Taylor (verified)
Nearest Neighbour: Ester, 102 m, bearing 161°, SSE
Wooden Lighter.
Built: 1879.
Sunk: 10 February 1936.
Jawbone Marine Sanctuary, Port Phillip
Depth: 4 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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