AC 120-57C

Advisory circular · Low Visibility Operations/Surface Movement Guidance and Control Systems (LVO/SMGCS)

Approved
September 26, 2023
Last reviewed
August 13, 2024
Cancels
AC120-57B
Family
AC 120-57 · 3 versions
Revision
C
14 CFR parts
91, 121, 135, 139

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

Show pages 68–79
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Port - of Seattle® ATTACHMENT 5

AIRFIELD LIGHTING EXHIBITS This attachment includes:

• Airfield Lighting Above 1200 RVR

• Inboard-Center Lighting < 1200 to 500 RVR

• Inboard-Center Lighting < 500 RVR

• Inboard-Outboard Lighting < 1200 to 500 RVR

• Inboard-Outboard Lighting < 500 RVR

• Center-Outboard Lighting < 1200 to 500 RVR

• Inboard-Center-Outboard Lighting < 1200 to 500 RVR Attachment 5-1. All Airfield Lighting Above 1200 RVR INTE *ITH SEA TAC ITERNATIONEL AMPORT

REA LISHTING WORTH & BOTH FLOW October 9, 2020 Page 31 of 36 E-31

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Port z of Seattle® Attachment 5-2. Inboard-Center 1200 RVR - 500 RVR Attachment 5-3. Inboard-Center Below 500 RVR October 9, 2020 Page 32 of 36 E-32

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Port - of Seattle® Attachment 5-4. Inboard-Outboard 1200 RVR - 500 RVR ANTB Attachment 5-5. Inboard-Outboard Below 500 RVR October 9, 2020 Page 33 of 36 E-33

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Port L of Seattle® Attachment 5-6. Center-Outboard 1200 RVR - 500 VR NTB Attachment 5-7. Inboard-Center-Outboard 1200 RVR - 500 RVR October 9, 2020 Page 34 of 36 E-34

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Port — of Seattle® ATTACHMENT 6.

LETTER OF AGREEMENT: LOW VISIBILITY PROCEDURES Seattle Airport Traffic Control Tower and Port of Seattle

LETTER OF AGREEMENT EFFECTIVE: December 15, 2014 SUBJECT: Low Visibility Operations/Surface Movement Guidance and Control System (LVO/SMGCS)

1. PURPOSE: To provide operating procedures for the movement of aircraft on the airport when the visibility conditions are reported to be less than 1,200 feet Runway Visual Range (RVR) consistent with the requirements of the Low Visibility Operations/Surface Movement Guidance and Control System (LVO/SMGCS) Plan.

2. CANCELLATION: Seattle ACT and Port of Seattle Letter of Agreement Subject: Low Visibility Procedures dated April 1, 1995, and Seattle ATCT and Port of Seattle Letter of Agreement Subject: Required Visual Inspection of LVO/SMGCS Lighting during Category III Operations dated March 4, 2009.

3. SCOPE: The procedures contained herein apply when conducting LVO/SMGCS procedures at Seattle-Tacoma International Airport.

4. RESPONSIBILITIES: The Port of Seattle (POS) Operations and Seattle Airport Traffic Control Tower (Tower) must adhere to the provisions set forth within this agreement and the attached LVO/SMGCS Plan.

5. PROCEDURES:

a. POS Operations and Tower must coordinate the implementation of LVO/SMGCS when visibility is less than 1800 feet RVR and falling, and decreasing RVR values indicate visibility less than 1,200 feet RVR is imminent on the runway in use.

b. Tower must notify POS Operations that LVO/SMGCS procedures are in effect and when terminated.

c. When visibility is less than 1200 feet RVR, Tower must operate LVO/SMGCS lighting for the runway configuration in use (e.g., controlled and uncontrolled stop bars, runway guard lights, taxiway centerline lights). Tower must report any alarms indicated on the Tower airfield lighting control panel to the Airport Duty Manager.

October 9, 2020 Page 35 of 36 E-35

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Port — of Seattle® Seattle Airport Traffic Control Tower and Port of Seattle

6. ATTACHMENT: LOW VISIBILITY OPERATIONS-SURFACE MOVEMENT

GUIDANCE AND CONTROL SYSTEM PLAN, SEA-TAC INTERNATIONAL AIRPORT, current edition.

Steven L. Vale Air Traffic Manager Seattle ATCT Jel f tik ed J. Fick Chief Executive Officer Port of Seattle 2 October 9, 2020 Page 36 of 36 E-36

Advisory Circular Feedback If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by emailing this form to 9-AWA-AFS400- COORD@faa.gov.

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