Kayaking Guide

What does it mean when someone says they are "good"?
I was on a guided kayak tour and some of us had to stop and wait for the rest of the crew. And there was this guy, my age (15) or a little older than I was watching and suddenly says, "Hey, you're fine." Well, I do not know much slang. Lol! I asked, 'What? "And he just laughed and paddled away. Anyone care to shed some light?
"You okay" = that's hot "That's OK, you're okay" = You're excused
Sea Kayaking: The Ultimate Guide