diff --git a/buoy_interfaces/msg/ElectroHydraulic.msg b/buoy_interfaces/msg/ElectroHydraulic.msg
index 93f2312..89c581b 100644
--- a/buoy_interfaces/msg/ElectroHydraulic.msg
+++ b/buoy_interfaces/msg/ElectroHydraulic.msg
@@ -1,11 +1,17 @@
-float64 inst_power  # Watts
 float64 rpm
+float64 upper_hydraulic_pressure  # Pa 
+float64 lower_hydraulic_pressure  # Pa 
 float64 force  # Newtons
 
+float64 supplied_hydraulic_power  # Watts
+
+float64 hydraulic_motor_loss
+float64 relief_valve_loss
+float64 shaft_mech_power  # Watts
+
 float64 motor_drive_i2r_loss
 float64 motor_drive_switching_loss
 float64 motor_drive_friction_loss
+float64 load_dump_power
 float64 battery_i2r_loss
-
-float64 eff_m  # mechanical efficiency
-float64 eff_v  # volumetric efficiency
+float64 battery_storage_power