ETAR

ETAR is an acronym that may refer to several terms depending on the context. The most common usages are in aviation and in European construction product assessment. In other domains, it may denote research reports or data formats, but those uses are less standardized.

In aviation, ETAR can stand for Estimated Time of Arrival Report. It is a communication in which a pilot or air traffic service provider conveys or updates the expected arrival time at a destination or hold point. ETARs are used to adjust ground services, gate assignments, and arrival sequencing. They are typically transmitted by voice radio or data link and are integrated with flight progress and ground-handling systems. An ETAR may include updated information such as remaining fuel, weather considerations, alternate plans, and contingency times, and may supersede earlier ETAs when conditions change.

In construction product conformity, ETAR stands for European Technical Assessment Report. This document accompanies a European Technical Assessment (ETA) and is issued under European regulatory frameworks to support the use of a product in specific end-uses where no harmonized European standard exists. The ETAR details the scope, performance criteria, conditions of use, and the basis of the assessment, helping to demonstrate conformity for market access and, where applicable, CE marking or national approvals.

Other uses of the acronym exist in technical, research, or organizational contexts, but the aviation and construction meanings are the most widely recognized. See also ETA for related European regulatory terminology.