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obstacle identification surface
- Definição1
- D1: A sloping surface used to identify obstacles in the departure area.
- Fonte1
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Aircraft operations: volume 2: construction of visual and instrument flight procedures. 6th. ed. Montreal, 2014. (Doc. 8168 OPS/611).
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Guidelines for electronic terrain, obstacle and aerodrome mapping information. Montreal, 2006. (Doc. 9881).
- Nota adicional1
- Acronym in English: OIS.
- Nota adicional2
- For straight departures the origin of the OIS is 5 m (16 ft) above the DER. For omnidirectional departures several OIS are considered (…). The OIS gradient is 2.5 per cent (Cat H, 4.2 per cent).
- Contexto
- Aerodrome obstacles penetrate a defined obstacle identification surface. In determining obstacle data requirements, certain accuracy parameters are applied to construct buffers around obstacles and estimate whether they penetrate the defined surface. Depending on the area specified, unrealistically large, converging or overlapping buffers may be generated, resulting in high false alarm conditions. Internationally recognized survey standards should be used.
- Spanish
- superficie de identificación de obstáculos