diff --git a/src/blackmisc/simulation/remoteaircraftprovider.h b/src/blackmisc/simulation/remoteaircraftprovider.h
index 74fa6f9f3..6ee874876 100644
--- a/src/blackmisc/simulation/remoteaircraftprovider.h
+++ b/src/blackmisc/simulation/remoteaircraftprovider.h
@@ -47,8 +47,10 @@ namespace BlackMisc
         class BLACKMISC_EXPORT IRemoteAircraftProvider
         {
         public:
-            static constexpr int MaxSituationsPerCallsign = 6; //!< How many situations per callsign
-            static constexpr int PartsPerCallsignMaxAgeInSeconds = 20; //!< How many seconds to keep parts for interpolation
+            static constexpr int MaxSituationsPerCallsign = 6;    //!< How many situations we keep per callsign
+            static constexpr int MaxPartsPerCallsign = 20;        //!< How many parts we keep per callsign (we keep more parts than situations as parts can just come in)
+            static constexpr int MaxPartsAgePerCallsignSecs = 60; //!< How many seconds to keep parts for interpolation
+            static constexpr int DefaultOffsetTimeMs = 6000;      //!< \fixme copied from CNetworkVatlib::c_positionTimeOffsetMsec
 
             //! Situations per callsign
             using CSituationsPerCallsign = QHash<BlackMisc::Aviation::CCallsign, BlackMisc::Aviation::CAircraftSituationList>;