diff --git a/ship.h b/ship.h
new file mode 100644
index 0000000000..271ae7f085
--- /dev/null
+++ b/ship.h
@@ -0,0 +1,15 @@
+/* $Id$ */
+
+#include "vehicle.h"
+
+
+static inline bool IsShipInDepot(const Vehicle* v)
+{
+	assert(v->type == VEH_Ship);
+	return v->u.ship.state == 0x80;
+}
+
+static inline bool IsShipInDepotStopped(const Vehicle* v)
+{
+	return IsShipInDepot(v) && v->vehstatus & VS_STOPPED;
+}