Index: trunk/src/tmcsim/cadsimulator/Coordinator.java
===================================================================
--- trunk/src/tmcsim/cadsimulator/Coordinator.java	(revision 152)
+++ trunk/src/tmcsim/cadsimulator/Coordinator.java	(revision 200)
@@ -189,4 +189,11 @@
                          * the ATMS server.  Does something happen every 30 seconds over there?
                          * Was it trying to make the Paramics time the same?
+                         * Neil says they had performance problems because the CPU that Paramics
+                         * ran on was so slow that it struggled to pump out the network data
+                         * within the 30 sec interval that ATMS uses for each refresh.
+                         * So perhaps this was an attempt to have Paramics synced with the
+                         * ATMS refreshes; but perhaps they discovered as I did that 
+                         * ATMS doesn't refresh exactly at the top of each minute, but at
+                         * some arbitrary time that depends on when the server was booted.
                          */
                         long sleepTime = ((60 * 1000) - (currentATMSTime % (60 * 1000))) % (30 * 1000);