Index: /issm/trunk-jpl/test/MITgcm/coupling_rules.txt
===================================================================
--- /issm/trunk-jpl/test/MITgcm/coupling_rules.txt	(revision 22454)
+++ /issm/trunk-jpl/test/MITgcm/coupling_rules.txt	(revision 22455)
@@ -6,5 +6,6 @@
 
 Initialization (CouplingTime=0)
-0. MITgcm send grid size (nx and ny) and grid coordinates (lat/long)
+0. MITgcm send grid size (NX and NY) and grid coordinates of
+   center of cells (longitude -180 <= XC < 180 and latitude YC)
 1. ISSM sends CouplingTime=0 base to MITgcm
 2. MITgcm integrates for CouplingTime=0:1