Tank marking stickers and decals from The Scuba Doctor are the perfect way to correctly and safely label the contents of a cylinder.
Tech Tip: Do I really need that big Nitrox wrap decal on my cylinder?
The large Nitrox tank wrap requirement mostly depends on your local dive shop fill policy. When Nitrox was introduced to sport diving there was widespread anxiety at local dive shop fill stations about cylinder contamination and handling safety. There were also fears of an injury as the result of an unqualified diver inadvertently breathing Voodoo Gas. While there is no law that requires the Nitrox wrap, the highly visible 'Nitrox', 'Nitrox Only', or 'Enriched Air Nitrox' tank wrap was helpful in addressing those early concerns.
Today, experience has demonstrated those safety worries about Nitrox to be relatively minor issues for the sport diving community. The large Nitrox tank wrap was quickly proven to be an imperfect solution to ensuring handling safety and identifying cylinder contents.
Many fill stations have adopted policies and practices that do not rely upon the presence of the Nitrox wrap. As a result, some local dive shops have become ambivalent about requiring the large wraps and are satisfied with a small removable tape label or tag that indicates cylinder contents analysis.
The factor that often determines the large permanent wrap requirement at many local dive shops is how the shop handles Nitrox fills. Shops that fill using premixed gas tend not to require the large wraps, but shops that partial pressure blend in the cylinder itself may still require the wraps.
In the early days practically all Nitrox fills were done using partial pressure blending, causing a common misconception that presence of a Nitrox tank wrap indicates the cylinder and valve are oxygen clean and oxygen compatible. However, the Nitrox wrap does NOT indicate the oxygen cleanliness or oxygen compatibility of the cylinder and valve, the wrap is just a label of what type of gas blend the cylinder may contain.
A separate evidence of inspection decal (aka VIP sticker) is what indicates if cylinder and valve are both suitable for use with compressed gases containing more than 23.5% oxygen at the date of inspection. Dive shop filling stations doing partial pressure blending will insist on your tank have an in-date Oxygen Clean sticker applied by the testing station that oxygen cleaned your cylinder.
Neither the Nitrox sticker or the Oxygen Clean decal indicate what compressed gas is stored in the cylinder. You should properly and clearly label your cylinder with your analysis of the gas mixture.
Clearly label anything that isn't air. If the MOD is less than the maximum possible depth of the dive (think deco cylinders), make sure the MOD stands out where not only you can see it, so can your buddies. Make it obvious to everyone if you are using the wrong cylinder at the wrong depth.
Consider putting a small piece of tape on each second stage, just in front of the mouthpiece, that has the MOD for the cylinder it is attached to. (This is in addition to the standard cylinder markings.) Any little thing that may save your life helps.
Tech Tip: Perfect Positioning of Scuba Tank Stickers
Select the general spot on your scuba cylinder to place the sticker and remove any old stickers and decals from that spot. On painted aluminium cylinders we recommend scraping any blistering or peeling areas to remove loose paint. Take an appropriate cleaner/solvent and wipe the area down a couple of times to remove dirt, wax and all other enemies of good adhesion. If you use any cleaning solvent, keep it off the valve and neck and be sure to rinse with soap and water when you are done.
Once the cylinder is clean, peel the backing off your sticker. Now the trick is to simply spray the area where the sticker is to be placed and also lightly wet the adhesive back of the sticker, with a thin coat of soapy water or Windex before you install the sticker. This gives a little lubrication and just enough surface tension to hold the sticker but not fully adhere it to the surface.
Apply the sticker to the cylinder. While wet, you can slip and slide the sticker into the perfect position. When you're sure it's in the right spot you simply hold it with one hand and squeegee the liquid out with the other.
Once it feels fairly adhered, blot the excess liquid off, and stand back to confirm placement. We say this because you still have some time to pull it off and re-position without penalty as there is a bit of liquid still under the sticker. Once the soap evaporates, the sticker adheres very well to the tank.
Reef Dive | Boat access
Depth: 15 m (49 ft) to 45 m (148 ft)
Level: Advanced Open Water and beyond.
The Plateau is a reef dive in the middle of the Port Phillip Heads. The Plateau is a huge rocky platform in around the 16-metre range, winding its way around the edge of this platform is the Entrance Deep. This is the deepest water in Victoria, originally part of the River Yarra. Depths at the bottom of this area are between 40 metres and 103 metres.
Like all dives in this particular area, amazing hard corals and soft sponges can be found on the face, with overhangs and small drop-offs. The dive is certainly one that you'll never forget, especially if the clarity of the water is good. You may even see the dolphins and seals that are know to show up here.
The slack water period here is short, hard to pick, and the currents a little unpredictable. Then of course there is the problem of the dive site being in the shipping channel. Diving is only possible when sea conditions, the tide, and shipping allow. Despite all of that this area is awesome with some fantastic rock formations sheltering an amazing array of sea life.
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 | © 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.
Wathaurong (Wadda-Warrung) country
Traditional Owners — This dive site is in the traditional Country of the Wathaurong (Wadda-Warrung) people of the Kulin Nation. This truly ancient Country includes the coastline of Port Phillip, from the Werribee River in the north-east, the Bellarine Peninsula, and down to Cape Otway in the south-west. We wish to acknowledge the Wathaurong 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 Plateau Location Map
Latitude: 38° 17.621′ S (38.293683° S / 38° 17′ 37.26″ S)
Longitude: 144° 37.976′ E (144.632933° E / 144° 37′ 58.56″ E)
Datum: WGS84 |
Added: 2012-07-22 09:00:00 GMT, Last updated: 2022-05-08 03:09:19 GMT
Nearest Neighbour: 65 Metre Hole, 310 m, bearing 13°, NNE
Depth: 15 to 45 m.
Dive only on: 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.