Reny Tyson of Duke Marine Lab sets up the marine mammal observing system, with curious onlookers.High seas kept us off the observing bridge, as every wave looks like a whale and any whale looks like a wave. We had a beautiful sunrise the next day, but after 45 minutes of surveying, the fog socked in. And today? 5 hours of effort... and only one tuna sighting. Our most common sighting this trip? Marine debris, mostly in the form of balloons.