During the 2014 Coast Guard Sector Jacksonville, Fla., Cutter Roundup, cutter crews compete against each other in the Heat and Beat Challenge Tuesday, April 29, 2014.

Heat and beat is a technique used by Coast Guard aids to navigation crews when attaching new chain to a buoy and involves heating a shackle pin until it is glowing and then beating it into place using sledgehammers.

U.S. Coast Guard video by Petty Officer 1st Class Lauren Jorgensen.