diff --git a/parm/config/config.base.emc.dyn b/parm/config/config.base.emc.dyn
index 0633db18f54..8e465c908ce 100755
--- a/parm/config/config.base.emc.dyn
+++ b/parm/config/config.base.emc.dyn
@@ -218,7 +218,7 @@ export LEVS=128
 export CASE="@CASECTL@"
 export CASE_ENKF="@CASEENS@"
 case "$CASE" in
-    "C48") export OCNRES=400;;
+    "C48") export OCNRES=500;;
     "C96") export OCNRES=100;;
     "C192") export OCNRES=050;;
     "C384") export OCNRES=025;;
diff --git a/parm/config/config.efcs b/parm/config/config.efcs
index bfffe3ced87..4dedc38d3a2 100755
--- a/parm/config/config.efcs
+++ b/parm/config/config.efcs
@@ -67,7 +67,7 @@ export cplwav=.false.
 
 # ocean model resolution
 case "$CASE_ENKF" in
-    "C48") export OCNRES=400;;
+    "C48") export OCNRES=500;;
     "C96") export OCNRES=100;;
     "C192") export OCNRES=050;;
     "C384") export OCNRES=025;;
diff --git a/parm/config/config.ocn b/parm/config/config.ocn
index 1675713e7c3..4d24c0d87f0 100644
--- a/parm/config/config.ocn
+++ b/parm/config/config.ocn
@@ -2,7 +2,7 @@
 
 # OCNRES is currently being set in config.base
 # case "$CASE" in
-#     "C48") export OCNRES=400;;
+#     "C48") export OCNRES=500;;
 #     "C96") export OCNRES=100;;
 #     "C192") export OCNRES=050;;
 #     "C384") export OCNRES=025;;