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Use of a head mountrd light temporarily to accomplish a tak needing both hands can help the diver illuminate the task, or keep track of the guideline in a penetration dive. the light may be switched on for the duration of the task, or the primary light may be temporarily placed on the helmet. A head mounted light is also immediately available ...
As such, this arrangement is more appropriate for divers who work or explore alone. Helmet mounts are appropriate for illuminating work which is monitored via a helmet-mounted closed circuit video camera. Hand-held lights can be directed by the diver independently of the direction the diver is facing and do not require any special mounting ...
A dive light can provide light if the visibility is sufficient. In zero visibility special precautions must be taken. It is usually preferable to use surface-supplied equipment with voice communications, as the diver can not get lost, and the surface team can monitor depth, time, breathing gas and decompression obligations.
Gloves and boots are worn which receive hot water from the ends of the arm and leg hoses. If a full-face mask is worn, the hood may be supplied by a tube at the neck of the suit. Helmets do not require heating. The heating water flows out at the neck and cuffs of the suit through the overlap with gloves, boots, or hood. [43]: ch18
The U.S. Consumer Product Safety Commission has warned for decades that children should never be allowed to ride on or operate riding lawnmowers, even with adult supervision. "Whenever you're ...
For safety and efficiency, divers may need to communicate with others diving with them, or with their surface support team. The interface between air and water is an effective barrier to direct sound transmission, [9] and the natural water surface is also a barrier to visual communication across the interface due to internal reflection, particularly when not perfectly smooth.
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