Band mask

Band mask is a term used in scuba diving and underwater diving to refer to a type of diving mask that covers the eyes and nose, but not the mouth. This type of mask is typically used in conjunction with a diving regulator or rebreather, which supplies the diver with breathing gas.

Design and Function

The band mask is designed to create an air space in front of the diver's eyes, allowing them to see clearly underwater. The mask is held in place by a strap, or band, that goes around the back of the diver's head. The band is usually made of rubber or silicone and can be adjusted for a secure fit.

The mask also includes a nose pocket, which allows the diver to equalize the pressure in their ears as they descend. This is done by pinching the nose and blowing gently, a technique known as the Valsalva maneuver.

Types of Band Masks

There are several types of band masks, including single-window and double-window designs. Single-window masks have one large pane of glass or plastic, while double-window masks have two separate panes. Some divers prefer the wider field of view offered by single-window masks, while others prefer the closer fit of double-window masks.

There are also band masks designed specifically for technical diving, which often include additional features such as a purge valve for clearing water from the mask, or a communication system for talking to other divers or surface support.

Safety Considerations

While band masks offer many advantages, they also have some potential drawbacks. For example, if the mask is dislodged or removed underwater, the diver's eyes and nose will be exposed to the water, which can be disorienting and potentially dangerous. Therefore, divers must be trained in how to clear and replace their mask underwater.

See Also

• Full face diving mask
• Diving helmet
• Snorkeling

Band mask Resources
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