diff --git a/reference-docs/examples/oceanrunner.cddal b/reference-docs/examples/oceanrunner.cddal
index ccd5f06..a42729a 100644
--- a/reference-docs/examples/oceanrunner.cddal
+++ b/reference-docs/examples/oceanrunner.cddal
@@ -599,6 +599,7 @@ instance ElectricHybridEngine < MDC_C002 {
   definition.en: "battery-electric primary propulsion with diesel range extender"
   superclass: EngineType
   class_type: ITEM_CLASS
+  applicable_properties: { battery_capacity, charging_power, electric_range }
 }
 
 instance battery_capacity < MDC_C003 {