Petty Officer 1st Class Brett Malehorn, of Mandeville, La., explains the dynamic forces involved with navigating through heavy surf conditions to Petty Officer 1st Class Jonathan McCollum, of Milton, Fla., and other instructors and students at the Coast Guard’s National Motor Lifeboat School Heavy Weather Coxswain course, March 14, 2014. Instructors at the Coast Guard’s National Motor Lifeboat School train coxswains to operate rescue boats safely in the most challenging and dangerous heavy weather surf conditions.