AC 70/7460-1A

Historical

Advisory circular · Obstruction Marking and Lighting

A newer version is currentThis is a historical version. AC 70/7460-1M is the version in force, approved November 6, 2020.
Last reviewed
October 31, 2023
Cancelled by
AC70/7460-1B
Family
AC 70/7460-1 · 7 versions
Revision
A, 1A
14 CFR parts
77

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 49–60
Page 61OCROpen in PDF

AC 70/7460-1A Appendix i 1 Jan 72 CHAPTER 7, 220.

SPECIFICATIONS FOR LIGHTING

CHIMNEYS AND

SIMILAR OBSTRUCTIONS

HEIGHT OF LIGHTS ON STRUCTURE IN FEET ABOVE GROUND LEVEL HIGH INTENSITY WHITE STROBE LIGHTS DAY AND NIGHTTIME 400 TOP 200 1/3 150 (1 LEVEL++ 300 ￾ 400 - 2 LEVELS - 500 600 700 800 900 Page 14 HEIGHT OF STRUCTURE IN FEET ABOVE GROUND LEVEL -3 LEVELS -

Page 62OCROpen in PDF

1 Jan 72 AC 70/7460-1A Appendix 1 1900 1700

HIGH INTENSITY WHITE STROBE LIGHTS

DAY AND NIGHTTIME 1500 HEIGHT OF LIGHTS ON STRUCTURE IN FEET ABOVE GROUND LEVEL 1300 1100 900 700 500 300 100 900 13 LEVELS L HEIGHT OF STRUCTURE IN FEET ABOVE GROUND LEVEL 1000 ,4 LEVELS, 1400 +5 LEVELS. 1500 Page 15

Page 63OCROpen in PDF

AC 70/7460-1A Appendix 1 1 Jan 72 2100

HIGH INTENSITY WHITE STROBE LIGHTS 1900 - DAY AND NIGHTTIME 1700 5/6 HEIGHT OF LIGHTS ON STRUCTURE IN FEET ABOVE GROUND LEVEL 2/5 500 300

- 1/% 00 - 1500 1600 -5 LEVELS- 1700 1800 1900 2000 2100 — 6 LEVELS

HEIGHT OF STRUCTURE IN FEET ABOVE GROUND LEVEL Page 16

Page 64OCROpen in PDF

1 Jan 72 AC 70/7460-1A Appendix 1 CHAPTER 8, 25a. SPECIFICATIONS FOR LIGHTING CHIMNEYS

- AND SIMILAR OBSTRUCTIONS

COMPOSITE

HEIGHT OF LIGHTS ON STRUCTURE IN FEET ABOVE GROUND LEVEL WHITE LIGHTS--- DAYTIME LIGHTING RED LIGHTS - NIGHTTIME LIGHTING LEGEND:

WHITE + RED BEACON WHITE + RED OBSTRUCTION LIGHT

ZZ RED OBSTRUCTION LIGHT -RED BEACON 1000 800 TOP 600 TOP 400 TOP 7/€- 1(1/27 200 2/3 11/2 + 2/5911 20149 150 -2 LEVELSH 300 -3 LEVELS -→- 450 - 4 LEVELS 600 -5 LEVELS-→I 750 900

HEIGHT OF STRUCTURE IN FEET ABOVE GROUND LEVEL

Page 65OCROpen in PDF

AC. 70/7460-1A appendix i 2100 1 Jan 72 1900 COMPOSITE:

1700 WHITE LIGHTS -- DAYTIME LIGHTING RED LIGHTS -- NIGHTTIME LIGHTING LEGEND:

HEIGHT OF LIGHTS ON STRUCTURE IN FEET ABOVE GROUND LEVEL -WHITE + RED BEACON~ 1500 →FRED BEACONT -RED OBSTRUCTION LIGHT IT WHITE + RED OBSTRUCTION LIGHT 1300 1100 OP 900 700 = 577 J227114 500 1/2t 4/9† 2/5 3/7L 142753/8.

300 + 1/3. 31óª миз/10- 2/7 ￾ 2/9- 1/5 100 1000 1050 11141/8- →7 LEVELS 200 D50 10 120130 Page 18 HEIGHT OF STRUCTURE IN FEET ABOVE GROUND LEVEL -18 LEVELS - 19 LEVELS 10 LEVELS→ 1350 1400

Page 66OCROpen in PDF

1 Jan 72 AC 70/7460-1A Appendix 1 2100 COMPOSITE:

WHITE LIGHTS --- DAYTIME LIGHTING RED LIGHTS ---NIGHTTIME LIGHTING -TOP LEGEND:

1900 WHITE + RED BEACON I STOP -RED OBSTRUCTION LIGHT- -WHITE + RED OBSTRUCTION LIGHT TERED BEACON- 13/14 TOP 1700 12/13 ITOP HEIGHT OF LIGHTS ON STRUCTURE IN FEET ABOVE GROUND LEVEL 11/13 01/1172 1500 210/11 Ť9/S

- 1300 19/11 ; 1100 =T 8/137 F7/11 =7/121 900

- 6/11 £1/97 700 - 5/11- 715/13L S3/14- -1/3 - 4/13 $1275 5001 3/11 3/13 этни 300 11/6 2/13 100 ¡1/11- • 1/12 1500 - || LEVELS| 165012 LEVELS | 800 - 13 LEVELS →14 LEVELS→| 1950 2100

HEIGHT OF STRUCTURE IN FEET ABOVE GROUND LEVEL :U.S. GOVERMMENT PRINTING OFFICE: 1971-720-335/041 Page 19