Safety buoy

a buoy to enable a person to float in water; a safety belt.

See also: Safety chain

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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I also will be towing a safety buoy all the time for safety and increased visibility, and we will be using a variety of non-telephone communication equipment and tracking equipment," he explained.
He added: "He didn't have a safety buoy, which they're supposed to have while underwater.
In addition, a safety buoy system is installed to alert Navy divers if the pilot has become incapacitated.
But witnesses said later that no safety buoy, used to indicate there were divers present, had been placed on the ocean surface.
"The life guards will no longer be manning beaches, they only work until the end of October, and this means without the safety buoys and life guards, people won't be able to use the sea safely.
For its part, the association, which has a membership of about 200 lake resident families, will add safety buoys at hazardous areas on the lake and install more signs listing the rules of craft operation and general decorum.
In the last 18 months more than 10 water safety buoys have been stolen from the park's lake ( putting an estimated 100,000 people at risk every year.
In the last 18 months more than 10 water safety buoys have been stolen from Herrington Country Park in Sunderland.
In the last 18 months, more than 10 safety buoys have been stolen from boating lakes in Sunderland's Herrington Country Park.