According to Official Guinness Records,
David Sandeman (UK) sailed across the Atlantic singlehandedly between Jersey, UK, and Newport, Rhode Island, USA, at the age of 17 years 176 days in the 10.67 m (35 ft) long Sea Raider in 1976. The voyage lasted 43 days.
Record last published in 1976. ***Record re-instated as Guinness World Records does not endorse or sanction any attempts under the age of 16 for this category***
For a complete list of 1976 records, please visit 1976 Guinness Records in United Kingdom.