Abstract
The ANSI/ASA S1.20-2012 standard, “Procedures for Calibration of Underwater Electroacoustic Transducers,” was released in February 2012. It is a revision of American National Standard S1.20-1988 (R2003). An overview of the content of this standard inclusive of the typical primary and secondary open water procedures for determining the measurable characteristics of free-field receive voltage sensitivity and transmitting responses are examined along with highlights of materials that are new to the 2012 revision. In this later category, this presentation provides overview information contained in the S1.20-2012 related to correction factor application (with an emphasis on extension cable usage) and introductory material on measurement uncertainty analysis (along with the identification of common error sources). A cursory look at the informational annexes will also be addressed with an emphasis on the 2012 revision-specific ones related to medium correction factors, nonlinear effects including cavitation, and a standard-target method for calibrating active sonars.
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