Standard Disclosure on Seasickness:  If you get motion sickness easily (e.g. riding in a car), you will probably become seasick. Otherwise, incidences of seasickness are highly variable depending on each person and the particular conditions.  I have seen the most experienced sailors get seasick in relatively mild conditions.  On the other hand, in over thirty years of sailing with a large number of beginners on inshore waters (and the Delaware River certainly qualifies) I have had only one person who was so uncomfortable so as to classify as being seasick.  Tips to avoid seasickness: 1) Do not sail hungover; 2) Stay on deck where your eyes can reference the horizon; 3) Avoid eating heavy, rich foods before and during sailing; 4) Stay comfortable –avoid getting chilled or overheated; 5) Relax and stay involved in the activity aboard.   Dramamine and other medicines do work for some people (Mike O’Gara recommends Marezine-see website); I haven’t used any but I think you may have to take them some hours before sailing if you want it to be effective. For other suggestions check  http://www.hmlanding.com/maldemar.htm    http://www.mikeogara.net/seasickness/