National foreword<br>National Annex NA (informative) - Bibliography<br>Foreword<br>Introduction<br>1 Scope<br>2 Normative references<br>3 General <br>4 Determination of probe index and beam angle<br>5 Time base setting<br>6 Sensitivity setting and echo height evaluation<br>Annex A (normative) - Quantities and symbols<br>Annex B (normative) - Reference blocks and reference reflectors<br>Annex C (normative) - Determination of sound path distance<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;and impingement angle in concentrically curved objects<br>Annex D (informative) - General DGS diagram<br>Annex E (informative) - Determination of contact transfer<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;correction factors<br>Bibliography