The day at sea...

provides an opportunity to learn more about the navigation equipment on the bridge, and to understand how the new forward-looking sonar functions (click to enlarge):

My GPS confirms our position (the dark triangle) as entering the Gulf of Riga in the eastern Baltic Sea, where visiting Latvia is tomorrow's focus:

A number of the staff used the time to present lectures, and I contributed a discussion about glaciers and glaciations in northern Europe.  In addition to stuffing our heads with new found knowledge, we enjoyed a late afternoon ice cream social with all sorts of sweet goodies:

Yes, it's difficult work aboard.