show to to set values on ESPDU before sending; comments too

CourseExamples/src/DisExamples/PduSender.java

@@ -59,13 +59,14 @@ public class PduSender
                         aPdu = new EntityStatePdu();
 						EntityStatePdu espdu = (EntityStatePdu) aPdu;
 						Marking marking = new Marking ();
-						marking.setCharactersString("PduSender");
+						marking.setCharactersString("PduSender"); // 11 characters max
 						espdu.setMarking(marking);
 						Vector3Double espduLocation = new Vector3Double();
 						espduLocation.setX(1.0);
 						espduLocation.setY(2.0);
 						espduLocation.setZ(3.0);
 						espdu.setEntityLocation(espduLocation);
+						// it is important to identify questions as you think of them
 						// TODO how to set azimuth, i.e. course direction over ground?
                         break;