YJ GIS Industrial Limited

In the equipment list of diving enthusiasts and professional divers, the outdoor diving knife holds a significant position and is regarded as a capable assistant for underwater exploration. With the continuous rise in the popularity of diving worldwide, from leisurely beach snorkeling to professional deep-sea cave exploration, the importance of diving knives has become increasingly prominent. Please provide the text you would like translated.

The history of the diving knife can be traced back to a distant past. As early as the 5th century BC, the Greek Silis and his daughter Sairen used hollow reeds as diving snorkels to dive underwater and cut the anchor cables of Persian enemy ships with sharp blades. This was the early application of diving knives in naval battles. Over the long course of time, diving knives have continuously evolved. Today, their design and materials have undergone earth-shattering changes to adapt to the complex and ever-changing underwater environment. Please provide the text you would like translated.

Functionally speaking, a diving knife serves multiple purposes. When divers encounter entanglements such as fishing nets or seaweed underwater, the sharp blade can quickly cut through the obstacles, helping them escape dangerous situations. In some cases, divers may also face threats from fierce underwater creatures. At such times, the diving knife becomes a powerful self-defense weapon. For instance, a doctor from New Zealand was bitten on the leg by a shark while diving for fish. He promptly used the diving knife he carried with him to fend off the shark and successfully escape. Additionally, the diving knife can be used to pry objects, measure, and even the hammering block at the end of the handle can be used to strike shellfish, meeting divers' various needs underwater. Please provide the text you would like translated.

Material and design are the key factors determining the performance of a diving knife. To resist the strong corrosiveness of seawater, modern diving knives mostly use stainless steel or titanium as their materials. For instance, the Type 05 diving knife selects stainless steel containing rare alloy elements and undergoes special surface anti-corrosion treatment. It can remain rust-free in a salt spray environment at 50℃ for 48 hours and has anti-magnetic properties, thus not triggering the electromagnetic fuse of underwater mines. In terms of design, the shape of the blade, the grip of the handle, and the way the sheath is fixed have all been carefully considered. Some diving knives have narrower and thinner blades to reduce resistance when used underwater; the handles are designed with anti-slip features, allowing divers to hold them firmly even in slippery conditions; and the sheaths are equipped with secure fastening and convenient one-handed draw functions, which can save precious time for divers in critical moments. Please provide the text you would like translated.

There are various types of diving knives on the market, with different styles and sizes. There are large diving knives similar in shape and size to hunting knives, suitable for dealing with more complex and dangerous underwater environments; there are also small diving knives as light as short swords, which can be placed on the forearm or the shoulder of the BCD, convenient for divers to use when performing delicate operations or pursuing ultimate portability. Some high-end diving knives incorporate innovative designs, such as adjustable leg straps and quick-release knife sheaths, allowing divers to use them more conveniently; some diving knives have diamond sharpening stones in the accessory layer of the knife sheath, allowing divers to sharpen the blade at any time to maintain its sharpness. Please provide the text you would like translated.

With the continuous advancement of technology, future diving knives may develop in an intelligent direction. Imagine that diving knives are integrated with GPS positioning systems, which can quickly send location signals when divers encounter danger, facilitating the location and search by rescue personnel; or incorporate sonar detection functions to detect underwater obstacles in advance, ensuring the safety of divers. These innovations will further enhance the value of diving knives in ensuring diving safety and improving the diving experience, allowing divers to explore the mysterious underwater world with greater peace of mind and composure. Please provide the text you would like translated.