A four-year-old girl has been rescued after drifting half a mile out to sea on her bodyboard.Jemima Chambers was playing in the shallows during a holiday on when she floated off. The girl's mother, Rebecca Chambers, said she was a "speck" way out to sea when she realised what had happened. Chambers jumped on to the back of a jetski and chased after the little girl. She was amazed to find when she got to the board that Jemima was lying contented and relaxed on the board with no idea of the panic she had been causing. She was brought back to shore unharmed.Jemima's adventure began when her mother and aunt Rachel Le Marquand decided to go for a swim around the harbour at Rozel Bay. When they returned to where Jemima had been playing with her cousins, the women realised she was missing.Chambers, a 35-year-old paediatrician from Gloucestershire, said: "I think I was lulled into a false sense of security because they were just paddling in the really shallow water. I made the poor decision to go for a swim myself and my attention was not as focused as it should have been."I was only gone a short while and as I came back I realised Jemima wasn't with the others on the shoreline. I asked the where she was and they all pointed at this speck on the horizon."It honestly just looked like a buoy floating out at sea; she had gone well beyond the seawall and out really far."Chambers said her daughter's relaxed state had helped her. "She thought she hadn't gone that far. It could have been a lot worse had she realised how far out she was; she could have panicked, lost her board and who knows what might have happened."She was never in any difficulty, I think she was just in a very relaxed state. She had her board, a lifejacket and a wetsuit on. I think the combination of high tides and strong sea winds swept her out that far, it apparently happened in a matter of minutes, one minute she was there, the next she wasn't."Jemima was delighted to be whizzed back to shore on a jetski. Chambers said: "I don't think she's realised the full impact of what could have happened. She was more excited about the jetski ride – that was the highlight of her holiday."