diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index b7efd793..9388c84f 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -527,6 +527,7 @@ def fetchcp(rower,theworkouts,table='cpdata'):
     theids = [int(w.id) for w in theworkouts]
     columns = ['power','workoutid','time']
     df = getsmallrowdata_db(columns,ids=theids)
+    df.dropna(inplace=True,axis=0)
     if df.empty:
         avgpower2 = {}
         for id  in theids:
diff --git a/rowers/templates/panel_ranking.html b/rowers/templates/panel_ranking.html
new file mode 100644
index 00000000..584ea695
--- /dev/null
+++ b/rowers/templates/panel_ranking.html
@@ -0,0 +1,6 @@
+<div class="grid_2 alpha">
+  <p>
+    <a class="button gray small" href="/rowers/workout/{{ workout.id }}/updatecp">
+      Make Ranking Piece</a>
+  </p>
+</div>
diff --git a/rowers/templates/summary_edit.html b/rowers/templates/summary_edit.html
index 2d49567a..93e1d89a 100644
--- a/rowers/templates/summary_edit.html
+++ b/rowers/templates/summary_edit.html
@@ -79,6 +79,10 @@
 <td>Four intervals of 6, 5, 3 and 3 minutes length, 3 minutes rest</td>
 </tr>
 <tr>
+<td>8x500m/3:30min </td>
+<td>8 times 500m with 3 minutes 30 seconds rest</td>
+</tr>
+<tr>
 <td>4x(500m+500m)/5min</td><td>4 times 1km, but each km is reported as two 500m intervals without rest</td>
 </tr>
 <tr>
diff --git a/rowers/utils.py b/rowers/utils.py
index 976418db..84c70aba 100644
--- a/rowers/utils.py
+++ b/rowers/utils.py
@@ -45,6 +45,7 @@ workflowleftpanel = (
     ('panel_editstream.html','Edit Stream Data'),
     ('panel_otwpower.html','Run OTW Power Calculations'),
     ('panel_mapview.html','Map'),
+    ('panel_ranking.html','Ranking View'),
     )
 
 defaultleft = [
diff --git a/rowers/views.py b/rowers/views.py
index 395f306d..9b4820dd 100644
--- a/rowers/views.py
+++ b/rowers/views.py
@@ -3252,7 +3252,10 @@ def workout_update_cp_view(request,id=0):
 
     dataprep.runcpupdate(r)
     
-    url = reverse(otwrankings_view)
+    if row.workouttype in ('water','coastal'):
+        url = reverse(otwrankings_view)
+    else:
+        url = reverse(oterankings_view)
 
     return HttpResponseRedirect(url)