© David Last Institut für Erdmessung und Navigation Universität der Bundeswehr, München 15 March 2007 Satellite Navigation – Truths & Myths Professor David.
© David Last 14 January 2009 Royal Ulster Yacht Club Satellite Navigation – Truths & Myths? Professor David Last Picture: earthobservatory.nasa. gov//ewsroom/BlueMarble
© David Last Loodswezen Congress of Dutch Pilots 1 September 2008 Satellite Navigation Systems – The Present Imperfect Professor David Last Picture: earthobservatory.nasa.
