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Knives / Shears / Cutters


Knives are a useful accessory to have at hand whilst diving. Depending on the type of dive you enjoy part taking in, you may use a dive knife for escaping snags or recovering objects from the depths.

Dive Knife: We think smaller is better! We are not in the camp that prefers large knives strapped to our shins. We believe they present an entanglement issue, and also are too far from our hands if we happen to get in a tight situation. As a result, we recommend a small knife in a sheath on the waist. This puts the handle right where your hands tend to be while diving. We also prefer titanium, for its durability and corrosion resistance.

Line Cutters: Sometimes a line cutter is simply a better dive tool in an emergency. Line cutters with two cutting edges tend to be easier to use. Some divers prefer mounting the line cutter in a sheath on the waist, others on a compass or computer strap on the wrist, or even tucked in a pocket.

EMT Shears: There are times when being able to apply pressure to the cutting surfaces with the multiplier of a fulcrum just plain comes in handy. Thus many divers like to have a set of EMT Shears, or similar.

Tech Tip: StainLESS does not mean StainPROOF

A common misconception among divers is that stainless steel does not corrode at all. There are various types of stainless steel, each with different corrosion properties, that make a specific grade more or less suited to a particular application. Because there is no perfect stainless steel, the selection of the grade is often a compromise between corrosion resistance and malleability. Stainless grades selected because they hold a sharp cutting edge will corrode relatively fast compared to other grades. The most corrosion resistant grades are not usually a good choice for bolt snaps and hand tools because depending on the use application they may not offer the best wear resistance or may be too brittle.

StainLESS does not mean StainPROOF and all diving products made of stainless steel must receive some basic care to help minimise corrosion. Rinse any stainless steel components in dive equipment with fresh water after diving or when otherwise in contact with salt water, allow them to dry and do not store them in damp or moist environments. Make sure any storage sheath or pouch is also rinsed and allowed to dry before returning the stainless item to the pouch. When rinsing bolt snaps, be sure to work the bolt action several times to eject any saltwater trapped in the slider and spring mechanism. In particular, avoid storing stainless steel near or in contact with other metals having strongly dissimilar electropotentials, especially aluminum, such that moisture can induce galvanic corrosion. In cases of galvanic corrosion where the stainless item is in close proximity to some types of metals, rust or other colour stains will electrolytically transfer to the surface of the stainless item.

An invisible film forms on the surface of stainless steel when it's in contact with oxygen. This allows it to withstand damage from corrosives including many acids, bases, and detergents, as well as salt water. However, depending on envirionmental conditions you may notice some surface 'stains' that can form on various stainless items. In general these are cosmetic in nature and we recommend you allow the cosmetic stains to remain when practical. Using an abrasive is more likely to remove the invisible corrosion resistant film that forms on stainless, allowing corrosion to spread and ultimately making the corrosion worse.



The Supermarket

Reef Dive Reef Dive | Boat access Boat access

Abalone Dive Site Crayfish Dive Site Open Water Rated Outside Port Phillip Reef Dive Site

Depth: 6 m (20 ft) to 18 m (59 ft)

Level: Open Water and beyond.

The Supermarket area is a large rocky outcrop that runs out from Lonsdale Beach outside Port Phillip Heads off the Barwon Coast in Bass Strait. There used to be an outfall from the abattoir on the other side of the sand dunes many years ago, but this has now gone.

The rock outcrop used to be home to hundreds of Crayfish, Port Jackson Sharks and Wobbegongs. The Crayfish are not as plentiful here as they once were but they can still be found. This site is only suitable for diving when conditions are calm as it is quite prone to surge from swell that might be running.

Location: Point Lonsdale, Victoria 3225

Bass Strait Warning: Always keep an eye on sea conditions throughout any shore or boat dive in Bass Strait on Victoria's coastline. Please read the warnings on the web page diving-in-bass-strait before diving or snorkelling this site.

Abalone Dive Site
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
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
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 Supermarket Location Map

Latitude: 38° 17.322′ S   (38.2887° S / 38° 17′ 19.32″ S)
Longitude: 144° 34.634′ E   (144.577233° E / 144° 34′ 38.04″ E)

Datum: WGS84 | Google Map
Added: 2012-07-22 09:00:00 GMT, Last updated: 2022-04-29 12:56:18 GMT
Source: GPS
Nearest Neighbour: The Ledges, 375 m, bearing 263°, W
Point Lonsdale, Barwon Coast.
Depth: 6 to 18 m.
Dive only on: SWF, SWE, Ebb.



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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