diff --git a/samples/blackmiscquantities_dbus/BlackMiscTest.Testservice.xml b/samples/blackmiscquantities_dbus/BlackMiscTest.Testservice.xml
index d8ba83ba6..a0ff44680 100644
--- a/samples/blackmiscquantities_dbus/BlackMiscTest.Testservice.xml
+++ b/samples/blackmiscquantities_dbus/BlackMiscTest.Testservice.xml
@@ -22,5 +22,13 @@
       <arg name="altitude" type="(didb(s)(s)b)" direction="in"/>
       <annotation name="org.qtproject.QtDBus.QtTypeName.In0" value="BlackMisc::Aviation::CAltitude"/>
     </method>
+    <method name="receiveMatrix">
+      <arg name="matrix" type="(ad)" direction="in"/>
+      <annotation name="org.qtproject.QtDBus.QtTypeName.In0" value="BlackMisc::Math::CMatrix3x3"/>
+    </method>
+    <method name="receiveList">
+      <arg name="list" type="ad" direction="in"/>
+      <annotation name="org.qtproject.QtDBus.QtTypeName.In0" value="QList&lt;double&gt;"/>
+    </method>
   </interface>
 </node>
diff --git a/samples/blackmiscquantities_dbus/main.cpp b/samples/blackmiscquantities_dbus/main.cpp
index 785539601..14d2bced8 100644
--- a/samples/blackmiscquantities_dbus/main.cpp
+++ b/samples/blackmiscquantities_dbus/main.cpp
@@ -7,6 +7,7 @@
 #include <QtDBus/qdbusabstractinterface.h>
 #include <QtDBus/qdbusconnection.h>
 #include <QCoreApplication>
+#include <QList>
 
 #include "testservice.h"
 #include "testservice_adaptor.h"
@@ -15,6 +16,7 @@
 
 using namespace BlackMisc::PhysicalQuantities;
 using namespace BlackMisc::Aviation;
+using namespace BlackMisc::Math;
 using namespace BlackMiscTest;
 
 /*!
@@ -88,12 +90,19 @@ int main(int argc, char *argv[])
             if (connection.send(m)) {
                 qDebug() << "Send via low level method" << m;
             }
-            TestserviceTool::sleep(2500);
 
             // same as interface message
             testserviceInterface.receiveStringMessage(msg);
             qDebug() << "Send string via interface" << msg;
-            TestserviceTool::sleep(2500);
+
+            // a list
+            QList<double> list;
+            list << 1.0 << 2.0 << 3.0;
+            testserviceInterface.receiveList(list);
+            qDebug() << "Send list via interface" << list;
+            qDebug() << "Key  .......";
+            getchar();
+
 
             // PQs
             CSpeed speed(speedValue++, BlackMisc::PhysicalQuantities::CSpeedUnit::km_h());
@@ -115,8 +124,17 @@ int main(int argc, char *argv[])
             testserviceInterface.receiveVariant(qv);
             testserviceInterface.receiveAltitude(al);
             qDebug() << "Send altitude via interface" << al;
-
             TestserviceTool::sleep(2500);
+
+            // Math
+            CMatrix3x3 m33;
+            m33.setCellIndex();
+            testserviceInterface.receiveMatrix(m33);
+            qDebug() << "Send matrix" << m33;
+
+            // next round?
+            qDebug() << "Key  .......";
+            getchar();
         }
     }
 
diff --git a/samples/blackmiscquantities_dbus/sample_quantities_avionics_dbus.pro b/samples/blackmiscquantities_dbus/sample_quantities_avionics_dbus.pro
index 52ddd002e..afabcc8a9 100644
--- a/samples/blackmiscquantities_dbus/sample_quantities_avionics_dbus.pro
+++ b/samples/blackmiscquantities_dbus/sample_quantities_avionics_dbus.pro
@@ -1,5 +1,4 @@
 QT       += core dbus
-QT       -= gui
 
 TARGET = sample_quantities_avionics_dbus
 TEMPLATE = app
diff --git a/samples/blackmiscquantities_dbus/testservice.cpp b/samples/blackmiscquantities_dbus/testservice.cpp
index bcca70f78..dbecd51c9 100644
--- a/samples/blackmiscquantities_dbus/testservice.cpp
+++ b/samples/blackmiscquantities_dbus/testservice.cpp
@@ -54,12 +54,27 @@ void Testservice::receiveComUnit(const BlackMisc::Aviation::CComSystem &comUnit)
 }
 
 /*
- * Receivealtitude
+ * Receive altitude
  */
 void Testservice::receiveAltitude(const BlackMisc::Aviation::CAltitude &altitude)
 {
     qDebug() << "Pid:" << TestserviceTool::getPid() << "Received altitude:" << altitude;
+}
 
+/*
+ * Receive matrix
+ */
+void Testservice::receiveMatrix(const BlackMisc::Math::CMatrix3x3 &matrix)
+{
+    qDebug() << "Pid:" << TestserviceTool::getPid() << "Received matrix:" << matrix;
+}
+
+/*
+ *
+ */
+void Testservice::receiveList(const QList<double> &list)
+{
+    qDebug() << "Pid:" << TestserviceTool::getPid() << "Received list:" << list;
 }
 
 } // namespace
diff --git a/samples/blackmiscquantities_dbus/testservice.h b/samples/blackmiscquantities_dbus/testservice.h
index 81e10e7b5..db169fcda 100644
--- a/samples/blackmiscquantities_dbus/testservice.h
+++ b/samples/blackmiscquantities_dbus/testservice.h
@@ -76,6 +76,17 @@ public slots:
      */
     void receiveAltitude(const BlackMisc::Aviation::CAltitude &altitude);
 
+    /*!
+     * \brief Receive matrix
+     * \param matrix
+     */
+    void receiveMatrix(const BlackMisc::Math::CMatrix3x3 &matrix);
+
+    /*!
+     * \brief Receive list
+     * \param list
+     */
+    void receiveList(const QList<double> &list);
 
 public:
     static const QString ServiceName;
diff --git a/src/blackmisc/aviobase.h b/src/blackmisc/aviobase.h
index e9b152acb..f99c0b583 100644
--- a/src/blackmisc/aviobase.h
+++ b/src/blackmisc/aviobase.h
@@ -21,6 +21,7 @@ namespace Aviation
  */
 class CAvionicsBase : public BlackMisc::CBaseStreamStringifier
 {
+
 protected:
 
     QString m_name; //!< name of the unit
diff --git a/src/blackmisc/aviomodulator.h b/src/blackmisc/aviomodulator.h
index e82270b0d..86419639c 100644
--- a/src/blackmisc/aviomodulator.h
+++ b/src/blackmisc/aviomodulator.h
@@ -11,6 +11,7 @@
 
 namespace BlackMisc
 {
+
 namespace Aviation
 {
 
diff --git a/src/blackmisc/basestreamstringifier.h b/src/blackmisc/basestreamstringifier.h
index 393cf4565..9e4e50dee 100644
--- a/src/blackmisc/basestreamstringifier.h
+++ b/src/blackmisc/basestreamstringifier.h
@@ -159,7 +159,7 @@ protected:
      * \brief Stream to DBus
      * \param argument
      */
-    virtual void marshallToDbus(QDBusArgument &) const { }
+    virtual void marshallToDbus(QDBusArgument &) const {}
 
     /*!
      * \brief Stream from DBus
diff --git a/src/blackmisc/blackmiscfreefunctions.cpp b/src/blackmisc/blackmiscfreefunctions.cpp
index 51316b601..e15b7eb22 100644
--- a/src/blackmisc/blackmiscfreefunctions.cpp
+++ b/src/blackmisc/blackmiscfreefunctions.cpp
@@ -34,6 +34,18 @@ void BlackMisc::Aviation::registerMetadata()
     CAltitude::registerMetadata();
 }
 
+
+/*
+ * Metadata for math
+ */
+void BlackMisc::Math::registerMetadata()
+{
+    CMatrix3x3::registerMetadata();
+    CMatrix3x1::registerMetadata();
+    CMatrix1x3::registerMetadata();
+}
+
+
 /*
  * Metadata for Blackmisc
  */
@@ -41,4 +53,5 @@ void BlackMisc::registerMetadata()
 {
     PhysicalQuantities::registerMetadata();
     Aviation::registerMetadata();
+    Math::registerMetadata();
 }
diff --git a/src/blackmisc/blackmiscfreefunctions.h b/src/blackmisc/blackmiscfreefunctions.h
index 22133fbf0..8309a12a3 100644
--- a/src/blackmisc/blackmiscfreefunctions.h
+++ b/src/blackmisc/blackmiscfreefunctions.h
@@ -7,6 +7,7 @@
 #define BLACKMISC_FREEFUNCTIONS_H
 #include "avallclasses.h"
 #include "pqallquantities.h"
+#include "mathallclasses.h"
 
 namespace BlackMisc {
 
@@ -34,6 +35,15 @@ void registerMetadata();
 
 } // Aviation
 
+namespace Math {
+
+/*!
+ * \brief Register metadata for math (matrices, vectors)
+ */
+void registerMetadata();
+
+}
+
 /*!
  * \brief Register all relevant metadata in BlackMisc
  */
diff --git a/src/blackmisc/mathallclasses.h b/src/blackmisc/mathallclasses.h
new file mode 100644
index 000000000..0bdf4325f
--- /dev/null
+++ b/src/blackmisc/mathallclasses.h
@@ -0,0 +1,14 @@
+/*  Copyright (C) 2013 VATSIM Community / contributors
+ *  This Source Code Form is subject to the terms of the Mozilla Public
+ *  License, v. 2.0. If a copy of the MPL was not distributed with this
+ *  file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef BLACKMISC_MATHALLCLASSES_H
+#define BLACKMISC_MATHALLCLASSES_H
+
+#include "blackmisc/mathmatrix1x3.h"
+#include "blackmisc/mathmatrix3x3.h"
+#include "blackmisc/mathmatrix3x1.h"
+#include "blackmisc/mathvector3d.h"
+
+#endif // guard
diff --git a/src/blackmisc/mathmatrix1x3.h b/src/blackmisc/mathmatrix1x3.h
index 614c456cc..0daeea83b 100644
--- a/src/blackmisc/mathmatrix1x3.h
+++ b/src/blackmisc/mathmatrix1x3.h
@@ -54,5 +54,6 @@ public:
 } // namespace
 
 } // namespace
+Q_DECLARE_METATYPE(BlackMisc::Math::CMatrix1x3)
 
 #endif // guard
diff --git a/src/blackmisc/mathmatrix3x1.h b/src/blackmisc/mathmatrix3x1.h
index c2da2aefd..e26b82810 100644
--- a/src/blackmisc/mathmatrix3x1.h
+++ b/src/blackmisc/mathmatrix3x1.h
@@ -76,5 +76,6 @@ public:
 } // namespace
 
 } // namespace
+Q_DECLARE_METATYPE(BlackMisc::Math::CMatrix3x1)
 
 #endif // guard
diff --git a/src/blackmisc/mathmatrix3x3.h b/src/blackmisc/mathmatrix3x3.h
index 80878ac94..b4da2c090 100644
--- a/src/blackmisc/mathmatrix3x3.h
+++ b/src/blackmisc/mathmatrix3x3.h
@@ -177,5 +177,6 @@ public:
 } // namespace
 
 } // namespace
+Q_DECLARE_METATYPE(BlackMisc::Math::CMatrix3x3)
 
 #endif // guard
diff --git a/src/blackmisc/mathmatrixbase.cpp b/src/blackmisc/mathmatrixbase.cpp
index 07dfc60b2..2bd2be4b3 100644
--- a/src/blackmisc/mathmatrixbase.cpp
+++ b/src/blackmisc/mathmatrixbase.cpp
@@ -69,6 +69,53 @@ template<class ImplMatrix, int Rows, int Columns> bool CMatrixBase<ImplMatrix, R
     return true;
 }
 
+
+/*
+ * Set cell index
+ */
+template<class ImplMatrix, int Rows, int Columns> void CMatrixBase<ImplMatrix, Rows, Columns>::setCellIndex()
+{
+    for (int r = 0; r < Rows; r++)
+    {
+        for (int c = 0; c < Columns; c++)
+        {
+            this->m_matrix(r, c) = r + 0.1 * c;
+        }
+    }
+}
+
+/*
+ * To list
+ */
+template<class ImplMatrix, int Rows, int Columns> const QList<double> CMatrixBase<ImplMatrix, Rows, Columns>::toList() const
+{
+    QList<double> list;
+    for (int r = 0; r < Rows; r++)
+    {
+        for (int c = 0; c < Columns; c++)
+        {
+            list.append(this->m_matrix(r, c));
+        }
+    }
+    return list;
+}
+
+/*
+ * From list
+ */
+template<class ImplMatrix, int Rows, int Columns> void CMatrixBase<ImplMatrix, Rows, Columns>::fromList(const QList<double> &list)
+{
+    Q_ASSERT_X(Rows * Columns == list.count(), "fromList()", "Mismatch of elements in list");
+    int ct = 0;
+    for (int r = 0; r < Rows; r++)
+    {
+        for (int c = 0; c < Columns; c++)
+        {
+            this->m_matrix(r, c) = list.at(ct++);
+        }
+    }
+}
+
 /*
  * All values equal?
  */
@@ -120,6 +167,16 @@ template <class ImplMatrix, int Rows, int Columns> QString CMatrixBase<ImplMatri
     return s;
 }
 
+/*
+ * Register metadata
+ */
+template <class ImplMatrix, int Rows, int Columns> void CMatrixBase<ImplMatrix, Rows, Columns>::registerMetadata()
+{
+    qRegisterMetaType<ImplMatrix>(typeid(ImplMatrix).name());
+    qDBusRegisterMetaType<ImplMatrix>();
+}
+
+
 // see here for the reason of thess forward instantiations
 // http://www.parashift.com/c++-faq/separate-template-class-defn-from-decl.html
 template class CMatrixBase<CMatrix3x3, 3, 3>;
diff --git a/src/blackmisc/mathmatrixbase.h b/src/blackmisc/mathmatrixbase.h
index bfd2d8c81..f6d95bf41 100644
--- a/src/blackmisc/mathmatrixbase.h
+++ b/src/blackmisc/mathmatrixbase.h
@@ -9,6 +9,7 @@
 #include "blackmisc/basestreamstringifier.h"
 #include "blackmisc/mathvector3dbase.h"
 #include <QGenericMatrix>
+#include <QDBusMetaType>
 
 namespace BlackMisc
 {
@@ -49,6 +50,34 @@ protected:
      */
     QString stringForConverter() const;
 
+    /*!
+     * \brief Stream to DBus
+     * \param argument
+     */
+    virtual void marshallToDbus(QDBusArgument &argument) const {
+        const QList<double> l = this->toList();
+
+        // there is an issue with the signature of QList, so I use
+        // individual values
+        foreach(double v, l) {
+            argument << v;
+        }
+    }
+
+    /*!
+     * \brief Stream from DBus
+     * \param argument
+     */
+    virtual void unmarshallFromDbus(const QDBusArgument &argument) {
+        QList<double> list;
+        double v;
+        while(!argument.atEnd()) {
+            argument >> v;
+            list.append(v);
+        }
+        this->fromList(list);
+    }
+
 public:
     /*!
      * \brief Default constructor
@@ -75,6 +104,18 @@ public:
      */
     virtual ~CMatrixBase() {}
 
+    /*!
+     * \brief List of values
+     * \return
+     */
+    const QList<double> toList() const;
+
+    /*!
+     * \brief List of values
+     * \return
+     */
+    void fromList(const QList<double> &list);
+
     /*!
      * \brief Equal operator ==
      * \param otherMatrix
@@ -264,6 +305,11 @@ public:
      */
     bool isZero() const;
 
+    /*!
+     * \brief Each cell gets a unique index (used primarily for testing)
+     */
+    void setCellIndex();
+
     /*!
      * \brief Is identity matrix? Epsilon considered.
      * \return
@@ -342,6 +388,11 @@ public:
         return this->getElement(row, column);
     }
 
+    /*!
+     * \brief Register metadata
+     */
+    static void registerMetadata();
+
 private:
     /*!
      * \brief Check range of row / column
diff --git a/src/blackmisc/pqbase.h b/src/blackmisc/pqbase.h
index b0d37129b..4883035a6 100644
--- a/src/blackmisc/pqbase.h
+++ b/src/blackmisc/pqbase.h
@@ -294,14 +294,6 @@ protected:
      */
     typedef double(*UnitConverter)(const CMeasurementUnit &, double);
 
-    /*!
-     * \brief Stream to DBus
-     * \param argument
-     */
-    virtual void marshallToDbus(QDBusArgument &argument) const {
-        argument << this->m_unitName;
-    }
-
 private:
     QString m_name; //!< name, e.g. "meter"
     QString m_unitName; //!< unit name, e.g. "m"
@@ -347,7 +339,6 @@ protected:
      */
     CMeasurementUnit &operator =(const CMeasurementUnit &otherUnit);
 
-protected:
     /*!
      * \brief String for streaming operators is full name
      * \return
@@ -397,6 +388,24 @@ protected:
         return value / this->m_conversionFactorToSIConversionUnit;
     }
 
+    /*!
+     * \brief Stream to DBus
+     * \param argument
+     */
+    virtual void marshallToDbus(QDBusArgument &argument) const {
+        argument << this->m_unitName;
+    }
+
+    /*!
+     * \brief Stream from DBus
+     * \param argument
+     */
+    virtual void unmarshallFromDbus(const QDBusArgument &) {
+        // the concrete implementations will override this default
+        // this is required so I can also stream None
+        (*this) = CMeasurementUnit::None();
+    }
+
 public:
     /*!
      * \brief Equal operator ==