Handle(HYDROData_ImmersibleZone) aZone =
Handle(HYDROData_ImmersibleZone)::DownCast( aDoc->CreateObject( KIND_IMMERSIBLE_ZONE ) );
Handle(HYDROData_ImmersibleZone) aZone =
Handle(HYDROData_ImmersibleZone)::DownCast( aDoc->CreateObject( KIND_IMMERSIBLE_ZONE ) );