// forward decls
class SGInterpTable;
+class SGSampleGroup;
class FGNavRecord;
typedef SGSharedPtr<FGNavRecord> FGNavRecordPtr;
// realism setting, are false courses and GS lobes enabled?
bool _falseCoursesEnabled;
+
+ SGSharedPtr<SGSampleGroup> _sgr;
bool updateWithPower(double aDt);