What types of medium-intensity obstacle lights are permitted for marking fixed objects with a height between 45 m and less than 150 m above ground level?

Medium-intensity obstacle lights, Type A, B, or C, should be used for fixed objects with a height from 45 m to less than 150 m above ground level.

What is the maximum spacing for intermediate lights when medium-intensity obstacle lights Type C are used on an object taller than 45 m?

The spacing should not exceed 52 m.

Which medium-intensity obstacle light types can be used alone for marking an extensive object?

Medium-intensity obstacle lights, Types A and C, can be used alone.

What is the maximum spacing for intermediate lights when medium-intensity obstacle lights Type A are used on an object taller than 105 m?

The spacing should not exceed 105 m.

For medium-intensity obstacle lights Type B, what is the maximum spacing for the alternating intermediate lights?

The spacing should not exceed 52 m.

What is the maximum uniform interval for high-intensity obstacle lights Type A between ground level and the top light(s)?

The uniform interval should not exceed 105 m.

When an object is surrounded by buildings, what elevation can be used as the equivalent of ground level for determining intermediate light spacing for medium-intensity obstacle lights Type A?

The elevation of the tops of nearby buildings can be used as the equivalent of ground level.

When an object is surrounded by buildings, what elevation can be used as the equivalent of ground level for determining intermediate light spacing for medium-intensity obstacle lights Type B?

The elevation of the tops of nearby buildings can be used as the equivalent of ground level.

When an object is surrounded by buildings, what elevation can be used as the equivalent of ground level for determining intermediate light spacing for medium-intensity obstacle lights Type C?

The elevation of the tops of nearby buildings can be used as the equivalent of ground level.

CS ADR-DSN.Q.848 Lighting of fixed objects with a height 45 m to a height less than 150 m above ground level

Q: When using medium-intensity obstacle lights Type A on a tall object, at what height above ground do additional intermediate lights become required?

Additional intermediate lights are required when the top of the object is more than 105 m above the level of the surrounding ground (or the elevation of tops of nearby buildings if surrounded by buildings).

Q: What is the maximum spacing allowed for additional intermediate lights when medium-intensity obstacle lights Type A are used on an object taller than 105 m?

The additional intermediate lights should be spaced as equally as practicable between the top lights and ground level (or tops of nearby buildings), with the spacing not exceeding 105 m.

Q: For an object marked with medium-intensity obstacle lights Type B, at what height do additional intermediate lights become necessary?

Additional intermediate lights are required when the top of the object is more than 45 m above the level of the surrounding ground or the elevation of tops of nearby buildings (if surrounded by buildings).

Q: What types of lights are used for the additional intermediate levels when medium-intensity obstacle lights Type B are installed on an object taller than 45 m?

The additional intermediate lights should be alternately low-intensity obstacle lights, Type B, and medium-intensity obstacle lights, Type B.

Q: What is the maximum spacing for the alternating intermediate lights when medium-intensity obstacle lights Type B are used?

The alternating intermediate lights should be spaced as equally as practicable, with the spacing not exceeding 52 m.

Q: When medium-intensity obstacle lights Type C are used on an object taller than 45 m, what is the required spacing for additional intermediate lights?

The additional intermediate lights should be spaced as equally as practicable between the top lights and ground level (or tops of nearby buildings), with the spacing not exceeding 52 m.

Q: For an object marked with medium-intensity obstacle lights Type C, at what height above ground do additional intermediate lights become mandatory?

Additional intermediate lights are required when the top of the object is more than 45 m above the level of the surrounding ground or the elevation of tops of nearby buildings (if surrounded by buildings).

Q: What is the maximum uniform interval for high-intensity obstacle lights Type A when used on a fixed object?

High-intensity obstacle lights Type A should be spaced at uniform intervals not exceeding 105 m between the ground level and the top light(s) specified in CS ADR-DSN.Q.846(d).

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CS ADR-DSN.Q.848 Lighting of fixed objects with a height 45 m to a height less than 150 m above ground level

ED Decision 2016/027/R

(a) Medium-intensity obstacle lights, Type A, B, or C, should be used where the object is an extensive one. Medium-intensity obstacle lights, Types A and C, should be used alone, whereas medium-intensity obstacle lights, Type B, should be used either alone or in combination with low-intensity obstacle lights, Type B.

(b) Where an object is indicated by medium-intensity obstacle lights, Type A, and the top of the object is more than 105 m above the level of the surrounding ground, or the elevation of tops of nearby buildings (when the object to be marked is surrounded by buildings), additional lights should be provided at intermediate levels. These additional intermediate lights should be spaced, as equally as practicable, between the top lights and ground level or the level of tops of nearby buildings as appropriate, with the spacing not exceeding 105 m.

(c) Where an object is indicated by medium-intensity obstacle lights, Type B, and the top of the object is more than 45 m above the level of the surrounding ground or the elevation of tops of nearby buildings (when the object to be marked is surrounded by buildings), additional lights should be provided at intermediate levels. These additional intermediate lights should be alternately low-intensity obstacle lights, Type B, and medium-intensity obstacle lights, Type B, and should be spaced as equally as practicable, between the top lights and ground level or the level of tops of nearby buildings as appropriate, with the spacing not exceeding 52 m.

(d) Where an object is indicated by medium-intensity obstacle lights, Type C, and the top of the object is more than 45 m above the level of the surrounding ground or the elevation of tops of nearby buildings (when the object to be marked is surrounded by buildings), additional lights should be provided at intermediate levels. These additional intermediate lights should be spaced as equally as practicable, between the top lights and ground level or the level of tops of nearby buildings, as appropriate, with the spacing not exceeding 52 m.

(e) Where high-intensity obstacle lights, Type A, are used, they should be spaced at uniform intervals not exceeding 105 m between the ground level and the top light(s) specified in paragraph CS ADR-DSN.Q.846(d), except that where an object to be marked is surrounded by buildings, the elevation of the tops of the buildings may be used as the equivalent of the ground level when determining the number of light levels.

[Issue: ADR-DSN/3]

Details

Source-Title: CS ADR-DSN.Q.848 Lighting of fixed objects with a height 45 m to a height less than 150 m above ground level View latest amendments

Erulesid: ERULES-1963177438-2321 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: CS (Certification specification)

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

CS ADR-DSN.Q.848 Lighting of fixed objects with a height 45 m to a height less than 150 m above ground level

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