diff --git a/global_oce_cs32/input_ad.sens/data.ecco b/global_oce_cs32/input_ad.sens/data.ecco
index 7d4b286..9394efd 100644
--- a/global_oce_cs32/input_ad.sens/data.ecco
+++ b/global_oce_cs32/input_ad.sens/data.ecco
@@ -3,6 +3,7 @@
 # *******************
  &ECCO_COST_NML
  &
+
 # ***************************
 # ECCO generic cost functions
 # ***************************
@@ -28,5 +29,15 @@
  gencost_outputlevel(3)=1,
  mult_gencost(3) = 1.,
 #
- &
+ gencost_avgperiod(4)  = 'step',
+ gencost_barfile(4) = 'm_boxmean_vol',
+ gencost_mask(4) = 'south30_mask',
+ gencost_name(4) = 'south30_densityfollowing_vol',
+ gencost_useDensityMask(4) = .TRUE.,
+ gencost_refPressure(4) = 0.0,
+ gencost_sigmaLow(4) = 24.0,
+ gencost_sigmaHigh(4) = 29.0,
+ gencost_outputlevel(4)=1,
+ mult_gencost(4) = 1.D+07,
 #
+ &