4th Entry, 1035 Hours: Once the Half Moon reaches its next destination at Bay Ridge Flats later today, the students will start collecting data for their research projects. Well, that's not quite true. For the salinity project, data collection begins now! While the ship lies at anchor at Gravesend Bay, literally around the corner from the ocean, Mr. Beiter introduces teams of students to the instruments used to collect water samples and measure salinity.