diff --git a/README.md b/README.md
index 3f0c2c7..ee23f7b 100644
--- a/README.md
+++ b/README.md
@@ -174,6 +174,12 @@ GALRawINAV
 PVTCartesian
 ```
 
+Per IRC with `ahu`, CNAV needs to be enabled on Septentrio too.
+
+```
+GALRawCNAV
+```
+
 *Some selections from simpleRTK3B "Edit Stream"*
 ![septentrio-simpleRTK3B-sbf](pics/ss-sept-sbf.png)