Date: June 16, 2018
Location: Deerfield Beach, FL
Online Registration for the World Record Attempt Longest Human Chain Underwater 2018 is Closed
| Distance | Race | Online Registration Closed | Race Day | |
| 400 Divers Total | World Record Attempt Longest Human Chain Underwater | June 2, 2018 (12:00am) | June 16, 2018 (7:30am) |