diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 8d8307ca..c8f392fd 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1128,6 +1128,13 @@ def save_workout_database(f2, r, dosmooth=True, workouttype='rower',
     if row == 0:
         return (0, 'Error: CSV data file not found')
 
+    try:
+        lat = row.df[' latitude']
+        if lat.mean() != 0 and lat.std() != 0 and workouttype == 'rower':
+            workouttype = 'water'
+    except KeyError:
+        pass
+
     if dosmooth:
         # auto smoothing
         pace = row.df[' Stroke500mPace (sec/500m)'].values