As the title says. Where did mask facing forward on top of head equates to diver in distress? Was it just a local thing that spread over time or was it science tried and tested by the great ones?
As you can tell from my tone, I think it is all poppycock. Tell me why I am so wrong. Bonus points for personal stories how lives were saved or even lost by essential mask signals.
As you can tell from my tone, I think it is all poppycock. Tell me why I am so wrong. Bonus points for personal stories how lives were saved or even lost by essential mask signals.