diff --git a/CMakeLists.txt b/CMakeLists.txt
index 32d5743b..bd128fee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ endif()
 
 # Define project
 project(ReadoutCard
-  VERSION 0.45.7
+  VERSION 0.46.0
   DESCRIPTION "O2 ReadoutCard library"
   LANGUAGES C CXX
 )
diff --git a/doc/releaseNotes.md b/doc/releaseNotes.md
index 518eaddc..f889b170 100644
--- a/doc/releaseNotes.md
+++ b/doc/releaseNotes.md
@@ -93,3 +93,6 @@ This file describes the main feature changes for released versions of ReadoutCar
 
 ## v0.45.7 - 13/03/2025
 - o2-roc-config: added (temporary) option --test-mode-ORC501 to enable testing of new firmware as described in [ORC-501](https://its.cern.ch/jira/browse/ORC-501).
+
+## v0.46.0 - 19/03/2025
+- class DmaChannelInterface: added getCounterFirstOrbit(), c.f. JIRA OMON-800
diff --git a/include/ReadoutCard/DmaChannelInterface.h b/include/ReadoutCard/DmaChannelInterface.h
index 16ac0fdf..99846424 100644
--- a/include/ReadoutCard/DmaChannelInterface.h
+++ b/include/ReadoutCard/DmaChannelInterface.h
@@ -143,6 +143,13 @@ class DmaChannelInterface
   /// Gets card unique ID, such as an FPGA chip ID in the case of the CRU
   /// \return A string containing the unique ID
   virtual boost::optional<std::string> getCardId() = 0;
+
+  /// Gets the first orbit received by CRU
+  /// cf JIRA OMON-800
+  /// \return orbit number, or -1 if not found.
+  virtual int32_t getCounterFirstOrbit() {
+    return -1;
+  }
 };
 
 } // namespace roc
diff --git a/src/Cru/CruDmaChannel.cxx b/src/Cru/CruDmaChannel.cxx
index 287fc651..2dd4fe66 100644
--- a/src/Cru/CruDmaChannel.cxx
+++ b/src/Cru/CruDmaChannel.cxx
@@ -481,5 +481,18 @@ boost::optional<std::string> CruDmaChannel::getCardId()
   }
 }
 
+int32_t CruDmaChannel::getCounterFirstOrbit() {
+  int address = 0x0;
+  int endpoint = getBar()->getEndpointNumber();
+  if (endpoint == 0) {
+    address = 0x64002C;
+  } else if (endpoint == 1) {
+    address = 0x74002C;
+  } else {
+    return -1;
+  }
+  return getBar2()->readRegister(address / 4);
+}
+
 } // namespace roc
 } // namespace o2
diff --git a/src/Cru/CruDmaChannel.h b/src/Cru/CruDmaChannel.h
index 42c4f221..eb0604d1 100644
--- a/src/Cru/CruDmaChannel.h
+++ b/src/Cru/CruDmaChannel.h
@@ -62,6 +62,8 @@ class CruDmaChannel final : public DmaChannelPdaBase
   virtual boost::optional<std::string> getCardId() override;
   AllowedChannels allowedChannels();
 
+  virtual int32_t getCounterFirstOrbit() override;
+
  protected:
   virtual void deviceStartDma() override;
   virtual void deviceStopDma() override;