Wearing anything, including tanks, that are yellow in the ocean, due to sharks.
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There was a TV commercial in the 1960s or 70s for a razor blade manufacturer touting their blades. Basically they maintained using a lesser blade that might draw blood was a hazard before diving where sharks might be in the water.Wearing anything, including tanks, that are yellow in the ocean, due to sharks.
They still had those in the early 80's, I learned to dive with one. The shop would leave a used CO2 cartridge in the mechanism so that students wouldn't activate it and rocket to the surface!Anyone else remember the BC’s that had a co2 cartridge for emergency accents? That was some scary stuff. This was back in the late 70’s