diff --git a/src/blackgui/components/callsigncompleter.cpp b/src/blackgui/components/callsigncompleter.cpp
index b91b14056..39cbc632e 100644
--- a/src/blackgui/components/callsigncompleter.cpp
+++ b/src/blackgui/components/callsigncompleter.cpp
@@ -47,13 +47,19 @@ namespace BlackGui
         CCallsignCompleter::~CCallsignCompleter()
         { }
 
-        BlackMisc::Aviation::CCallsign CCallsignCompleter::getCallsign() const
+        CCallsign CCallsignCompleter::getCallsign(bool onlyKnownCallsign) const
         {
             const QString csString = ui->le_Callsign->text().trimmed().toUpper();
-            if (!this->isValidKnownCallsign(csString)) { return CCallsign(); }
+            const bool valid = onlyKnownCallsign ? this->isValidKnownCallsign(csString) : CCallsign::isValidAircraftCallsign(csString);
+            if (!valid) { return CCallsign(); }
             return CCallsign(csString, CCallsign::Aircraft);
         }
 
+        void CCallsignCompleter::setCallsign(const CCallsign &cs)
+        {
+            ui->le_Callsign->setText(cs.asString());
+        }
+
         QString CCallsignCompleter::getRawCallsignString() const
         {
             return ui->le_Callsign->text();
@@ -65,6 +71,13 @@ namespace BlackGui
             return this->isValidKnownCallsign(csString);
         }
 
+        void CCallsignCompleter::setReadOnly(bool readOnly)
+        {
+            if (ui->le_Callsign->isReadOnly() == readOnly) { return; }
+            ui->le_Callsign->setReadOnly(readOnly);
+            this->setStyleSheet(this->styleSheet());
+        }
+
         void CCallsignCompleter::updateCallsignsFromContext()
         {
             if (!sGui || sGui->isShuttingDown()) { return; }
diff --git a/src/blackgui/components/callsigncompleter.h b/src/blackgui/components/callsigncompleter.h
index 8e3ad04df..aaa4b4620 100644
--- a/src/blackgui/components/callsigncompleter.h
+++ b/src/blackgui/components/callsigncompleter.h
@@ -42,7 +42,10 @@ namespace BlackGui
             virtual ~CCallsignCompleter();
 
             //! Get the entered callsign
-            BlackMisc::Aviation::CCallsign getCallsign() const;
+            BlackMisc::Aviation::CCallsign getCallsign(bool onlyKnownCallsign = true) const;
+
+            //! Prefill wit callsign
+            void setCallsign(const BlackMisc::Aviation::CCallsign &cs);
 
             //! String as entered
             QString getRawCallsignString() const;
@@ -50,6 +53,9 @@ namespace BlackGui
             //! Is valid callsign?
             bool hasValidCallsign() const;
 
+            //! Set read only
+            void setReadOnly(bool readOnly);
+
         signals:
             //! Callsign entered
             void validCallsignEntered();