In the context of GM1 ADR-DSN.Q.841, what examples are given of visual routes adjacent to which objects might need marking?

Waterway and highway are given as examples of visual routes.

For overhead wires crossing a highway, what must be done to the wires themselves and to their supporting towers?

The wires should be marked, and the supporting towers should be marked and lighted, if a safety assessment indicates a hazard to aircraft.

What specific action is recommended for overhead wires, cables, or similar crossing a river, waterway, valley, or highway?

Overhead wires, cables, etc., crossing a river, waterway, valley, or highway should be marked, and their supporting towers should be marked and lighted, if a safety assessment indicates that the wires or cables could constitute a hazard to aircraft.

Does GM1 ADR-DSN.Q.841 require marking of all objects outside the obstacle limitation surfaces?

No, it only requires marking and/or lighting if a safety assessment indicates that the object could constitute a hazard to aircraft.

GM1 ADR-DSN.Q.841 Objects to be marked and/or lighted outside the lateral boundaries of the obstacle limitation surfaces

Q: When are objects located outside the lateral boundaries of the obstacle limitation surfaces required to be marked and/or lighted?

Objects outside the obstacle limitation surfaces should be marked and/or lighted if a safety assessment indicates that the object could constitute a hazard to aircraft, including objects adjacent to visual routes such as waterways or highways.

Q: According to GM1 ADR-DSN.Q.841, what is the condition for marking and lighting supporting towers of overhead cables crossing a valley?

The supporting towers should be marked and lighted if a safety assessment indicates that the wires or cables could constitute a hazard to aircraft.

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GM1 ADR-DSN.Q.841 Objects to be marked and/or lighted outside the lateral boundaries of the obstacle limitation surfaces

ED Decision 2016/027/R

(a) Other objects outside the obstacle limitation surfaces should be marked and/or lighted if a safety assessment indicates that the object could constitute a hazard to aircraft (this includes objects adjacent to visual routes e.g. waterway, highway).

(b) Overhead wires, cables, etc., crossing a river, waterway, valley or highway should be marked and their supporting towers marked and lighted if a safety assessment indicates that the wires or cables could constitute a hazard to aircraft.

[Issue: ADR-DSN/3]

Details

Source-Title: GM1 ADR-DSN.Q.841 Objects to be marked and/or lighted outside the lateral boundaries of the obstacle limitation surfaces View latest amendments

Erulesid: ERULES-1963177438-2521 Compare versions

Domain: Aerodromes

Activitytype: Aerodrome operations, Aerodrome design, Manufacturing

Amendedby: CS Issue 3

Applicabilitydate: 15 December, 2016

Entryintoforcedate: 14 December, 2016

Icaoreference: Annex 14, Volume I

Regulatedentity: Aerodrome operator, Aerodrome design organisation, Aerodrome equipment manufacturer

Regulatorysource: ED Decision 2016/027/R Navigate

Regulatorysubject: CS-ADR-DSN

Technicalsubjectmatter: Obstacles

Typeofcontent: GM to CS (Guidance material to certification specification)

Parentir: CS ADR-DSN.Q.841 Objects to be marked and/or lighted outside the lateral boundaries of the obstacle limitation surfaces

Easacategory: Non-instrument runway, Non-precision approach runway, Precision approach runway Category I, Precision approach runway Category II, Precision approach runway Category III, Take-off runway

Origin: EASA

Category: EAR