How to Wear a Dive Knife

Diving not only requires courage and skills but most importantly, reliable diving equipment and effective technical support and logistics are needed. So How to Wear a Dive Knife is very important. Among them, a dive knife is an important part of the whole set of diving equipment. Choosing a suitable diving knife is an important guarantee for diving safety, and wearing the dive knife correctly also enables divers to use it safely underwater. It is a must-have course for divers.

Why must a diver be equipped with a diving knife?

When divers are underwater or conducting underwater operations, they cannot predict whether they will be attacked by underwater ropes or underwater creatures. At this time, divers equipped with a suitable diving knife can effectively help them cut off ropes or plants entangled on themselves, or help divers defend against attacks from underwater creatures.
In addition, when a diver encounters danger underwater and needs assistance from a diving partner, they can use the metal part of the diving knife to knock on the oxygen tank to send out a distress signal, allowing the diving partner to arrive in time to provide rescue.
Some collection of underwater marine life also requires a specialized diving knife, such as for underwater hunting activities.
In short, the diver is equipped with a suitable diving knife to ensure their safety and success in underwater activities.

How to choose the right dive knife?

The design of the diving knife mainly adopts a one-handed opening mode to minimize the burden on the diver.
According to the opening method of the diving knife, it can be divided into insert-type and foldable-type. The insert-type diving knife consists of a sheath tied to the diver’s body and a handle that can be easily pulled out with one hand.
The foldable diving knife consists of a pouch hanging on the diver’s body and a foldable diving knife.
According to the shape of the diving knife blade, it can be divided into pointed, flat, and serrated.
The pointed blade is mainly used for stabbing actions.
The blunt blade is primarily used for removing organisms adhering to the seabed.
The serrated blade is mainly used for cutting ropes.
Blades of dive knives can be classified into stainless steel blades and titanium alloy blades based on material.
The stainless steel blades of scuba diving knives are harder and sharper. Titanium alloy blades have a corrosion-resistant effect in seawater.
There is also the option of customising a dive knife if you have personalised it.

How to wear a dive knife?

To secure a dive knife, you need to first thread two rubber dive knife straps through the sheath of the dive knife, then fasten the knife straps to the diver’s thigh and adjust the length of the straps to ensure that the dive knife does not slip off in the water. If the dive knife is attached to the diving weight belt, you need to pass the dive knife sheath through the weight belt and secure it in the appropriate direction beforehand.

dive knife
If the diving knife needs to be secured to the forearm, the length of the knife strap also needs to be adjusted to ensure the stability of the diving knife in the water. If the diving knife has a sheath, the sheath itself needs to be securely attached to a suitable D-ring on the BCD. In short, the key points of wearing a diving knife are for the diver to wear it comfortably, use it conveniently, and ensure it does not come loose, while also regularly checking that the knife strap is not loose.

Dive Knife Safety and Maintenance

Sharpening your dive knife: Keeping it effective

Due to the long use of dive knives under seawater, your dive knives will be dull inevitably. So sharpening dive knives properly will be necessary. A whetstone or sharpening stone is often recommended because it removes the least amount of material from the blade.
The general process is as follows: place the heel of your dive knife on the far edge of the stone, hold the blade at the desired angle and apply appropriate pressure, and slowly pull the dive knife over the stone toward you. The blade should move smoothly across the stone. Then lift the dive knife and repeat the above steps Reverse the knife and repeat the process as you did on the first side until your whole dive knife is sharpened well again.
Remember that regularly sharpening your diving knives will extend their longevity, but over-sharpening them can have negative results and reduce their lifespan.

Cleaning and caring for your dive knife to prevent corrosion

To ensure and maintain your dive knife’s durability, be sure that you are washing your dive knife properly. Rinse the knife with fresh water after each dive to prevent corrosion, and applying a rust-inhibiting oil on the blade is more recommended. Here are some things to keep in mind when cleaning your dive knife:
Clean dive knives immediately after use.
Hold the dive knives by the handle.
Scrub slowly and carefully.
Rinse, dry, and store the dive knives safely immediately after cleaning.

Safe handling practices to avoid injuries

Always carry a dive knife with the blade pointed downward.
The diving knife should be worn within reach of both hands. If possible, it is strongly suggested to carry two diving knives, equipped in different places when diving.
A large diving knife can be equipped on the inner side of the calf, making it easy to pick up and avoiding entanglement. Small-size diving knives can be worn on the thing side, arms, or counterweight straps.
After use, rinse with fresh water and cool dry in a timely manner. Proper maintenance can ensure the longevity of diving knives.
Never leave a blade out when not in use.
Please do not put the diving knife in your carry-on luggage when traveling by plane.
Keep your dive knives far away from children.


In summary, Divers need to choose a suitable and satisfactory diving knife, and learn how to correctly wear and use the diving knife. Only in this way can they ensure the safety and reliability of completing various tasks and activities during diving, and improve the safety and comfort of divers underwater.

Common Questions and Answers (FAQ)

Q: Where is the best place to wear a dive knife for quick accessibility?

The best place to wear a diving knife is either strapped to the diver’s thigh or on their waist at a convenient position, ensuring that the diver can easily and quickly use it in emergency situations. Some divers prefer to hang the diving knife on their BCD, so the specific positioning depends entirely on the diver’s personal preference and the form of the diving knife.

Q: Are there preferred spots to mount a dive knife on the dive gear?

Yes, the usual wear positions are as follows:
1. The calf: Many divers choose to wear their dive knife securely on their calf.
2. The BCD: Some diving BCDs are specially designed with attachments for dive knives, making it easy for divers to mount their knives on the BCD.
3. The weight belt: Many divers prefer to mount their dive knives on their weight belt for easy access.
4. The arm or wrist: Some dive knives are designed to be worn on the arm or wrist for quick access underwater.

Q: Is it advisable to mount a dive knife on a weight belt?

This type of inconvenient wear is not desirable. In the event of an emergency underwater, the ideal way for a diver to carry a diving knife is to strap it to the thigh or BCD, wearing it on a weight belt will hinder the diver from using it effectively and quickly.

Q: What’s the recommended frequency for dive knife maintenance?

It is recommended to perform daily maintenance on the diving knife within 4 hours of coming ashore after each dive. Each component of the diving knife should be disassembled and cleaned with fresh water, then dried with a clear cloth and oiled before reassembly, in order to prevent corrosion from seawater on the blade.
Before each dive, it is necessary to sharpen the blade with a sharpening stone to ensure that the diving knife is sharp and ready for use.

Q: What’s the best way to ensure my dive knife doesn’t get lost during a dive?

Many divers complain that their dive knives are easily lost in low visibility underwater, so it is important to ensure that the dive knife is securely fastened to the thigh or BCD before each dive. Additionally, a coiled lanyard can be attached to the dive knife to effectively prevent loss. Of course, it is also important to regularly check the security of the dive knife during the dive.

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