Lancashire Rural Police Constable Christian Seddon had tried to revive 13-year-old Dylan Ramsay in 2011 when he drowned in a quarry in Whittle-le-Woods.
To mark World Drowning Prevention Day he has decided to relive the heartbreaking day in a bid to deter others from the same fate.
He said: "I remember the first time I saw Dylan. His eyes were closed and his skin was very, very pale and his lips were blue.
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"There was just no reaction from him whatsoever.
"I knew that we were going to be in trouble trying to save him."
What is the one thing that will remain with him the most from that fateful day?
He added: "We were performing CPR for about 15 minutes but it seemed like an hour.
"One thing I remember for the chest compressions was the actual gurgling sound within Dylan.
"I did my best but I failed.
"One overriding memory of that day is hearing the scream of Becky and that noise will live with me."
He urged people to think before they entered cold water as "10 seconds is all it takes for someone going into the water to being rendered unconscious".
What does Rebecca say about her son?
It's been over a decade since Rebecca Ramsay received the phone call that would change her life forever but the empty void still remains.
Dylan, who she describes as a "people person", had his whole life in front of him when he died.Rebecca, who has relentlessly campaigned for the past 11 years on the dangers of water, says it has taken it's toll.
She said: "I had a heart attack just last year, but that won't stop me trying to make a difference wherever and whenever I can."I have had so many collaborations and so much is happening but not enough. We were promised a parliamentary round table meeting - when is that happening?
What’s next on the agenda for Rebecca Ramsay and what is her end goal?
"I got the 100k signatures they wanted so why are we not seeing change?She added: "I'm pleased and support world national drowning prevention day but it comes far to late for me and so many others.
"I've achieved so much and received so many awards but they are all so bitter sweet I'd rather have my son back."The end goal is to not see drownings happen that's unrealistic so to reduce the number would be amazing."
What is National Drowning Prevention Day?Every year an estimated 236,000 people drown, and it is one of the top 10 fatalities of children aged five to 14.
National Drowning Prevention Day is held on July 25 every year as a means of raising awareness of the catastrophic and long-term effects of drowning on families and communities, as well as life saving ways to prevent it.
With thanks to producers of the video Nice and Serious.