ARTOA4-UserManual/Offsets.md

@@ -40,6 +40,10 @@ value is set by either copying "Measured", "Emprical" or " Optimum" to "Applied"
 
 taken from "-empric_offset" in soso file. Gives Empric Offset entered manually by editor of soso file based on experiece. Should be associated with data given in "Offset Start Date".
 
+This window gives an overview of known offsets and drifts of the assigned sound sources, based on either physical measurements at sea (Start and End Offsets and Drift), user experience (Empirical (Start-)Offset and Empirical Drift), or Matrix Inversion (Optimum Offset and Drift).
+
+Any of these values can be assigned to "Applied", which will be used in calculating float positions.  Unknonw Values (NaNs) default to 0, or can be populated with Optimal Values (from Matrix Inversion)
+
 **column Emprical Drift (non editable)**
 
 taken from "-empric_drift" in soso file. Gives Empric Drift entered manually by editor of soso file based on, e.g., results on the merged inversion of multiple floats.