Maximum Distance Covered in Open Sea Swimming by a Child: P Sanjana (Chennai, Tamil Nadu). She swam 13.49 nautical miles in 4 hours, 48 minutes and 2 seconds in the open sea from VGP, Injambakkam, ECR, Chennai to Kannagi Statue at Marina Beach, Chennai, at the age of 10 years, 11 months, and 26 days. (Photo | India Book of Records)