FCC ID: IPH-02895 Low Power Transmitter 2402-2480 MHz

GDL 51 Portable SiriusXM and GPS Receiver Users Guide 2017 Garmin Ltd. or its subsidiaries. All rights reserved. This manual reflects the operation of System Software version 2.00, or later. Some differences in operation may be observed when comparing the information in this manual to later software versions. Garmin International, Inc. 1200 E. 151st Street, Olathe, KS 66062 USA Aircraft On Ground (AOG) Hotline: (913) 397-0836 Aviation Dealer Technical Support Line (Toll Free): (888) 606-5482 Garmin (Europe) Ltd. Liberty House, Hounsdown Business Park, Southampton, Hampshire SO40 9LR U.K. Garmin aviation product support and warranty information can be found at www.flygarmin.com. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express written permission of Garmin. Garmin hereby grants permission to download a single copy of this manual and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed for personal use, provided that such electronic or printed copy of this manual or revision must contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited. This part shall comply with Garmin Banned and Restricted Substances document, 001-00211-00. Garmin is a registered trademarks of Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express permission of Garmin. iPad, iPhone, iPod, and iPod touch are trademarks of Apple Inc., registered in the USA and other countries. AndroidTM is a trademark of Google Inc. Sirius, XM, SiriusXM, and all related marks and logos are trademarks of Sirius XM Radio Inc. All other marks, channel names, and logos are the property of their respective owners. All rights reserved. The Bluetooth word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such marks by Garmin is under license. July 2017 Printed in the United States or Taiwan WARNING: The attitude information provided by the GDL 51 is not intended to be used as a source of attitude information for flight in instrument meteorological conditions. WARNING: This unit provides the ability to receive weather information through external sources. Use weather data only as an aid to situational awareness. Such weather information is merely supplemental and advisory in nature and is not intended to be relied upon as safety-critical information in connection with any aviation, vehicle, or marine usage. The user should always exercise caution and common sense when confronted with severe weather conditions. WARNING: Do not use data link weather information for maneuvering in, near, or around areas of hazardous weather. Information contained within data link weather products may not accurately depict current weather conditions. WARNING: For safety reasons, GDL 51 operational procedures must be learned on the ground. WARNING: Use the GDL 51 only as an aid for VFR navigation. Do not attempt to use the GDL 51 for any purpose requiring precise measurement of direction, distance, location, or topography. This product should not be used to determine ground proximity for aircraft navigation. i 190-02087-00 Rev. AGarmin GDL 51 Users Guide WARNING: The altitude calculated by the GPS receiver is geometric height above Mean Sea Level and could vary significantly from the altitude displayed by pressure altimeters. WARNING: The pressure altitude information provided by the GDL 51 in a pressurized airplane will not be accurate. Use the connected display device to disable pressure information from the GDL 51. WARNING: The GDL 51 has a very high degree of functional integrity. However, the pilot must recognize that providing monitoring and/or self-

test capability for all conceivable system failures is not practical. Although unlikely, it may be possible for erroneous operation to occur without a fault indication shown by the GDL 51. It is thus the responsibility of the pilot to detect such an occurrence by means of cross-checking with all redundant or correlated information available in the cockpit. WARNING: The GDL 51 contains a lithium-ion battery. To prevent damage, remove the unit from the aircraft or vehicle when exiting or store it out of direct sunlight. WARNING: The United States government operates the Global Positioning System and is solely responsible for its accuracy and maintenance. The GPS system is subject to changes which could affect the accuracy and performance of all GPS equipment. ii Garmin GDL 51 Users Guide190-02087-00 Rev. A WARNING: When installing the GDL 51 in an aircraft, place the unit securely so that it does not interfere with aircraft operating controls or obstruct the pilots view. CAUTION: The Garmin GDL 51 does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modifications could void both the warranty and the pilots authority to operate this device under FAA/FCC regulations. NOTE: Temporary Flight Restriction (TFR) data is provided by the FAA and may not be updated outside of normal business hours. Confirm data currency through alternate sources and contact the local FSS for interpretation of TFR data. This product has not been endorsed or otherwise approved by the National Geospatial-Intelligence Agency, or the United States Department of Defense (10 U.S.C. 425). NOTE: All visual depictions contained within this document, including images of the GDL 51 and the bezel, displays, and screens of other products are subject to change and may not reflect the most current software or hardware. Depictions of equipment may differ slightly from the actual equipment. NOTE: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive harm. This notice is being provided in accordance with Californias Proposition 65. If you have any questions or would like additional information, please refer to our web site at www.garmin.com/prop65. iii 190-02087-00 Rev. AGarmin GDL 51 Users Guide FCC Compliance This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and may cause harmful interference to radio communications if not installed and used in accordance with the instructions. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and the receiver. Connect the equipment into an outlet that is on a different circuit from the unit. Consult the dealer or an experienced radio/TV technician for help. Innovation, Science and Economic Development Canada Compliance This device complies with Innovation, Science and Economic Development Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Innovation, Sciences et Dveloppment conomique Canada - Conformit Cet appareil est conforme aux normes RSS sans licence du ministre Innovation, Sciences et Dveloppement conomique Canada. Son fonctionnement est soumis aux deux conditions suivantes

: (1) ce priphrique ne doit pas causer dinterfrences et (2) doit accepter toute interfrence, y compris lappareil. M/N: A02895 iv interfrences pouvant entraner un fonctionnement indsirable de les Garmin GDL 51 Users Guide190-02087-00 Rev. A 1 Unit Overview Micro-USB Connector Optional External SXM Antenna Connection Power Button Optional External GPS Antenna Connection Figure 1 GDL 51 Interface Data/Power Port Audio Out Port 1 190-02087-00 Rev. AGarmin GDL 51 Users Guide Power and Charging 1.1 The unit will always turn on when external power is applied. Power source via the micro-USB connector:

5.0V 0.25V; 1.0A (powered on and slow charge) 5.0V 0.25V; 2.0A (powered off and fast charge) Power Source via the power/data connector:

10-32V; 0.75A Max (powered on and slow charge) 10-32V; 1.0A Max (powered off and fast charge) NOTE: If powered ON from a standard USB wall charger the unit will auto detect the wall charger and go into standby mode. In standby mode, the battery LED will be solid red if charging, or off if the battery is fully charged. Press the power button for normal operation. Maximum total power while in standby mode is 10W. Total charge time is ~2 hours in this state. NOTE: The battery saver feature will turn off the unit when external power is removed if all three of the following conditions are true:

1. Ground Speed less than 20kts OR No GPS fix 2. No Connext connection 3. Running on battery only 2 Garmin GDL 51 Users Guide190-02087-00 Rev. A NOTE: When the battery saver feature is active and the above three conditions are met, the green battery LED will flash if the unit is about to shut down. Press the power button once to cancel the battery saver feature and keep the unit on. 2 OPeratiOn Power Button Functions 2.1 ON/OFF single press Clear Paired Devices o See Section 2.2 Bluetooth Setup USB Mass Storage Mode 3 second press o While the unit is booting up, hold the Power Button for 3 seconds. o GPS, SXM LEDs will flash orange while in this state. o Limited functionality, can be used to install SW upgrades.

(see Section 2.3) o Press the power button to exit this mode. Reset the Unit Hold for more than 10 seconds. 3 190-02087-00 Rev. AGarmin GDL 51 Users Guide 2.2 Bluetooth Setup 1. When the GDL 51 is powered on, the GDL 51 will go into pairing mode. Directions for connecting the GDL 51 to a specific display can be found in the displays pilots guide. 2. The Connext LED will be solid blue when the display device is connected. Two Bluetooth display devices may be connected to the GDL at the same time. 3. A Bluetooth Audio device may also be connected to the GDL 51. Directions for connecting an audio device are included in the pilots guide of the connected display. NOTE: If having issues making a Bluetooth connection hold the power button down for 5 seconds. The blue LED will begin blinking. Release the power button and then press the Power button again for 5 seconds. Power cycle the GDL 51 and retry making a Bluetooth connection. If the problem persists, consult the GDL 51 Installation Manual. 2.3 Software Updates Software updates for the GDL 51 can be received through your Garmin display device or from www.garmin.com/products/webupdater/. See the display device documentation for details. Instructions for using Webupdater can be found on the Garmin website. 4 Garmin GDL 51 Users Guide190-02087-00 Rev. A LED Color/

State*

OFF RED ORANGE GREEN Figure 2 GDL 51 LEDs Table 1 GDL 51 Status LEDs Battery Connext GPS SXM Unit off No active connection No GPS fix No signal Charging (solid) Fault (flashing) Battery <=20%

Battery >= 20%

OR External power is applied Battery saver feature

(flashing) Not used Fault Fault N/A N/A Firmware update Firmware update GPS fix Marginal good signal BLUE N/A

*LEDs are auto-dimming. Active connection OR pairing list cleared

(flashing) N/A N/A 5 190-02087-00 Rev. AGarmin GDL 51 Users Guide 3 inStallatiOn The GDL 51 may be connected to a compatible display device by either a wireless Bluetooth connection or directly through a serial cable. The GDL 51 supports two connections to Bluetooth display devices. The GDL 51 can also be physically wired to two displays. 3.1 3.1.1 interface Cables GDL 51 to aera 660 Power/Data Cable To GDL 51 Data/Power Port 011-03854-91 To aera 660 Mount Figure 3 GDL 51 to aera 660 Power/Data Cable (010-12373-02) Power Connector 6 Garmin GDL 51 Users Guide190-02087-00 Rev. A 3.1.2 GDL 51 to Bare Wire Power/Data Cable Table 2 GDL 51 to Bare Wire Power/Data Cable Connections Connection Vin 10-32 VDC Not Used Rx B (Data In) Tx B (Data Out) Rx A (Data In) Tx A (Data Out) Ground EMI FILTER Wire Color Red Gray White/Orange Orange White/Green Green Black AWG 26

--

28 28 28 28 26 Figure 4 GDL 51 to Bare Wire Power/Data Cable (010-11686-40) 7 190-02087-00 Rev. AGarmin GDL 51 Users Guide 3.2 external antennas (Optional) The GDL 51 includes internal GPS and SiriusXM antennas, but can use optional external antennas. NOTE: The GDL 51 can receive GPS information when interfaced with certain Garmin GPS receivers. Refer to your specific Garmin display manual to determine if this is supported. 3.3 3.3.1 GDl 51 location and Mounting Location For best reception position the GDL 51 where it has a clear view of the sky. For proper performance of the attitude function, the GDL 51 should be placed as close as possible to the center of the aircraft (along its longitudinal axis) with the FWD arrow pointing in the direction of flight. If the unit is placed on the glare shield it may get very hot due to the direct sunlight and reduce the operating life of the unit. The GDL 51 antenna, internal or external, should be mounted at least 3.3 feet (1 meter) away from the path of any high powered transmitter antenna, such as a transponder or VHF radio antenna. The GDL 51 should be mounted at least 6 inches (10.24 cm) away from a magnetic compass. 8 Garmin GDL 51 Users Guide190-02087-00 Rev. A WARNING: It is the sole responsibility of the owner/operator of the GDL 51 to place this mount and secure the unit so that it will not interfere with the aircrafts operating controls and safety devices, or cause damage or personal injury in the event of an accident or turbulence. Do not mount the GDL 51 where the pilot or passengers are likely to impact it in an accident, collision, or turbulence. The mounting hardware provided by Garmin is not warranted against turbulence, collision damage, or related consequences. 3.3.2 GDL 51 Mounting A mounting plate is included to provide a fixed mount inside the aircraft, if desired. The GDL 51 has a rubber pad that keeps the unit from sliding around, if the mounting plate is not used. The GDL 51 may be mounted in a remote location away from the cockpit, but may require the use of an external antenna for best GPS and SiriusXM reception. 1. Locate the proposed mounting position. Ensure that the cabling will reach the required connections with room to secure the cables in a safe manner. Cables may be inserted into the slot in the included suction cup to assist in routing cables. 2. Place the mounting plate in position and mark the location of the four mounting holes. 3. Drill holes for the mounting screws with the appropriately sized bit. 4. Attach the mounting plate with four #8 flat head 100 screws (not supplied). 9 190-02087-00 Rev. AGarmin GDL 51 Users Guide 5. Ensure that the FWD arrow on the serial number tag is pointing in the 6. direction of flight. Insert the GDL 51 into the mounting plate and then push down gently so it snaps into place. WITH MOUNTING BRACKET

.177 4.50 THRU ALL

.344 8.74 X 100 NOTE 3 2X 1.188 30.16 2X 1.500 38.10 Figure 5 GDL 51 w/Mounting Bracket 10 Garmin GDL 51 Users Guide190-02087-00 Rev. A 4 4.1 aPPenDiX Contact Garmin If you have questions concerning unit operation or repair, Garmin aviation product support and warranty information can be found at www.flygarmin.com. When contacting Garmin, please have the following information:

System configuration (products, antennas, mounting locations, etc.) Model No., part number, and serial number Software versions Description of the problem Efforts made to isolate/solve the problem 4.2 Servicing Your Unit The Garmin GDL 51 has no user-serviceable parts. The GDL 51 is sealed to protect the unit. Any attempt to open the case to change or modify the unit in any way voids your warranty and may result in permanent damage to the equipment. GDl 51 Physical Specifications 4.3 Operating Temperature Range: -20C to 60C (-4 F to +140 F) Unit dimensions: WxHxD: 4.9 x 1.3 x 3.4 (12.44 x 3.30 x 8.64 cm) Weight: 0.75 lbs (0.45 kg) 11 190-02087-00 Rev. AGarmin GDL 51 Users Guide 4.4 Software license agreement BY USING THE GDL 51, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT CAREFULLY. Garmin grants you a limited license to use the software embedded in this device (the Software) in binary executable form in the normal operation of the product. Title, ownership rights, and intellectual property rights in and to the Software remain with Garmin. You acknowledge that the Software is the property of Garmin and is protected under the United States of America copyright laws and international copyright treaties. You further acknowledge that the structure, organization, and code of the Software are valuable trade secrets of Garmin and that the Software in source code form remains a valuable trade secret of Garmin. You agree not to decompile, disassemble, modify, reverse assemble, reverse engineer, or reduce to human readable form the Software or any part thereof or create any derivative works based on the Software. You agree not to export or re-export the Software to any country in violation of the export control laws of the United States of America. 12 Garmin GDL 51 Users Guide190-02087-00 Rev. A 4.5 Battery information If these guidelines are not followed, the internal Lithium Ion battery may experience a shortened life span or may present a risk of damage to the unit, fire, chemical burn, electrolyte leak, and/or injury. Do not leave the unit exposed to a heat source or in a high temperature location, such as in the sun in an unattended aircraft on a hot day. To prevent damage, remove the unit from the aircraft or store it out of direct sunlight. Do not disassemble, puncture, damage, or incinerate the unit/battery. When storing the unit for a limited length of time (less than 30 days), store within the following temperature range: -4 to 122F (-20 to 50C). When storing the unit for an extended time, store within the following temperature range: -4 to 86F (-20 to 30C). Do not operate the unit outside of the following temperature range:

-4 to 140F (-20 to 60C). Do not remove or attempt to remove the non-user-replaceable battery. Do not immerse or expose unit to water or other liquids. Do not use a power and data cable that is not approved or supplied by Garmin. Contact your local waste disposal department to dispose of the device in accordance with applicable laws and regulations. 13 190-02087-00 Rev. AGarmin GDL 51 Users Guide 4.6 Product registration Help us better support you by completing your online registration today! Have the serial number of your product handy and connect to the Garmin web site

(http://my.garmin.com). Look for the Product Registration link on the Home page. Also, be sure to record your serial number in the space provided. To obtain accessories for your unit, please contact your Garmin dealer or visit garmin.com/aviation. Help us better support you by completing our on-line registration form today!

Registration ensures that you will be notified of product updates and new products and provides lost or stolen unit tracking. Please, have the serial number of your unit handy, connect to our web site (www.garmin.com) and look for our Product Registration link on the Home page. Use the line below to record the serial number in case it is lost, is stolen, or needs service. The serial number is located on the bottom of your unit. Serial Number: ________________________ 4.7 aCtivatinG a SiriusXM SUBSCriPtiOn SiriusXM offers several subscription options. Go to http://www.siriusxm.com/

sxmaviation to determine which subscription package is best for your needs. 14 Garmin GDL 51 Users Guide190-02087-00 Rev. A Before you can activate your SiriusXM subscription, you must have the radio ID. The radio ID is available in the product box, the units S/N tag, and on the System Information Page of a connected device. See the owners manual provided with your device for more information. 1. Contact SiriusXM by phone at (866) 528-7474 or go to http://care.siriusxm.com to subscribe. 2. Provide the necessary information to the SiriusXM representative or on the web site to activate your antenna. 3. Verify the functionality of the activated services:

For SiriusXM weather, on a connected device, view the Weather Products list and confirm that your subscribed services are listed. See the owners manual provided with your device for more information. For SiriusXM radio, on a connected device, go to the SiriusXM Audio Page and confirm that radio channels are available. See the owners manual provided with your device for more information. If the service is not activated within the hour, go to http://care.siriusxm. com/refresh or contact SiriusXM by phone at 1-855-MYREFRESH

(697-3373). 4. NOTE: For the unit to receive the SiriusXM signal, it must be powered on, facing skyward, and tuned to channel 1. 15 190-02087-00 Rev. AGarmin GDL 51 Users Guide 4.8 4.8.1 SiriusXM Satellite radio Service agreement SiriusXM Satellite Radio Inc. Hardware and required monthly subscription sold separately. USER ACKNOWLEDGES THAT GARMIN HAS NO CONTROL OVER THE TERMS AND REQUIREMENTS OF THE SUBSCRIPTION. COMPATIBILITY OF HARDWARE EQUIPMENT WITH THEN-CURRENT SUBSCRIPTION OFFERING OF SERVICE PROVIDER IS ALSO BEYOND GARMINS CONTROL. GARMIN SHALL HAVE NO LIABILITY IF CHANGES IN SERVICE PROVIDERS SUBSCRIPTION OFFERING NEGATIVELY IMPACTS OR RENDERS IMPOSSIBLE THE USE OF PURCHASED GARMIN HARDWARE EQUIPMENT WITH THE SERVICE PROVIDERS OFFERING IN THE FUTURE. Subscription fee is consumer only. Other fees and taxes, including a one-time activation fee may apply. All programming fees and weather data subject to change. SiriusXM weather data and individual product availability vary by hardware equipment. Reception of the SiriusXM signal may vary depending on location. Subscriptions subject to Customer Agreement included with the SiriusXM Welcome Kit and available at www.siriusxm.com. USER ACKNOWLEDGES THAT GARMIN IS AN INTENDED THIRD PARTY BENEFICIARY OF SUCH CUSTOMER AGREEMENT, AND THAT ALL DISCLAIMERS CONTAINED THEREIN EQUALLY APPLY AS IF SUCH DISCLAIMERS WERE MADE DIRECTLY BY GARMIN. Available only in the 48 contiguous United States. 16 Garmin GDL 51 Users Guide190-02087-00 Rev. A THE USER AGREES THAT THE SiriusXM WEATHER SERVICE OFFERING IS PROVIDED AS IS, THAT YOUR GARMIN HARDWARE EQUIPMENT ONLY ALLOWS THE DISPLAY OF SUCH SERVICE OFFERING, AND THAT ANY CHANGES BY THE SERVICE PROVIDER MAY INTERFERE WITH THE ABILITY OF YOUR GARMIN HARDWARE EQUIPMENT TO RECEIVE OR DISPLAY SUCH SERVICE OFFERING. FURTHER, SUCH SERVICE OFFERING CONTAINS INFORMATION FURNISHED BY OTHERS WHO ARE NOT UNDER THE CONTROL OF GARMIN, AND THEREFORE THE SERVICE OFFERING IS ACCORDINGLY FURNISHED WITHOUT ANY WARRANTY OF GARMIN, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 17 190-02087-00 Rev. AGarmin GDL 51 Users Guide 4.8.2 Caution - Advisory Only THE WEATHER INFORMATION IS SUBJECT TO SERVICE INTERRUPTIONS AND MAY CONTAIN ERRORS OR INACCURACIES AND CONSEQUENTLY SHOULD NOT BE RELIED UPON EXCLUSIVELY. YOU ARE URGED TO CHECK ALTERNATE WEATHER INFORMATION SOURCES PRIOR TO MAKING SAFETY RELATED DECISIONS. YOU ACKNOWLEDGE AND AGREE THAT YOU SHALL BE SOLELY RESPONSIBLE FOR USE OF THE INFORMATION AND ALL DECISIONS TAKEN WITH RESPECT THERETO. BY USING THIS SERVICE, YOU RELEASE AND WAIVE ANY CLAIMS AGAINST SiriusXM RADIO INC., THE WEATHER COMPANY, NAVCAST INCORPORATED, AND GARMIN SWITZERLAND GmbH AND ALL OF THEIR RESPECTIVE AFFILIATES WITH REGARD TO THIS SERVICE. 18 Garmin GDL 51 Users Guide190-02087-00 Rev. A 4.8.3 User Safety If you use SiriusXM Services it is your responsibility to exercise prudent discretion and observe all safety measures required by law and your own common sense. You assume the entire risk related to your use of the Services. SiriusXM and Garmin assume no responsibility for accidents resulting from or associated with use of the Services. Your Radio Service includes weather information, and you acknowledge that such information is not for safety for life, but is merely supplemental and advisory in nature, and therefore cannot be relied upon as safety-

critical in connection with any aircraft, or automobile usage. This information is provided as is and SiriusXM and Garmin disclaim any and all warranties, express and implied, with respect thereto or the transmission or reception thereof. SiriusXM and Garmin further do not warrant the accuracy, reliability, completeness or timeliness of the weather information disclosed on the Radio Service. In no event will SiriusXM and Garmin, their data suppliers, service providers, marketing/

distribution, software or Internet partners or hardware manufacturers be liable to you or to any third party for any direct, indirect, incidental, consequential, special, exemplary or punitive damages or lost profits resulting from use of or interruptions in the transmission or reception of the Services. 19 190-02087-00 Rev. AGarmin GDL 51 Users Guide 4.8.4 Limits On Our Responsibility a) DISCLAIMERS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, WE MAKE NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, REGARDING THE RADIO SERVICE. YOUR USE OF THE SERVICE IS AT YOUR SOLE RISK. THE CONTENT AND FUNCTIONALITY OF THE SERVICE IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. ALL SUCH WARRANTIES OR REPRESENTATIONS (INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT) ARE HEREBY DISCLAIMED. b) LIMITATIONS OF LIABILITY. WE ARE NOT RESPONSIBLE FOR ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES RELATING TO THE USE OF THE RADIO SERVICE, WHETHER BASED ON NEGLIGENCE OR OTHERWISE. OUR TOTAL LIABILITY TO YOU AND ANY OTHER PERSONS RECEIVING OUR SERVICES, REGARDLESS OF THE CAUSE, WILL IN NO EVENT EXCEED THE AMOUNTS THAT YOU HAVE PAID TO US FOR THE SERVICE THAT YOU RECEIVED DURING THE SIX (6) MONTH PERIOD IMMEDIATELY PRIOR TO THE SPECIFIC EVENT THAT GAVE RISE TO THE APPLICABLE DAMAGE OR LOSS. THIS ALLOCATION OF RISK IS REFLECTED IN OUR PRICES. YOU MAY HAVE GREATER RIGHTS THAN DESCRIBED ABOVE UNDER YOUR STATES LAWS. 20 Garmin GDL 51 Users Guide190-02087-00 Rev. A 2017 GARMIN Corporation Garmin International, Inc. 1200 E. 151st Street Olathe, KS 66062 USA Aircraft On Ground (AOG) Hotline: (913) 397-0836 Aviation Dealer Technical Support Line (Toll Free): (888) 606-5482 Garmin Aviation Product Support: (866) 739-5687 Garmin (Europe) Ltd. Liberty House, Hounsdown Business Park Southampton, Hampshire SO40 9LR U.K. Garmin aviation product support and warranty information can be found at www.flygarmin.com. Part Number 190-02087-00 Rev. A

WARNING: The altitude calculated by the GPS receiver is geometric height above Mean Sea Level and could vary significantly from the altitude displayed by pressure altimeters. WARNING: The United States government operates the Global Positioning System and is solely responsible for its accuracy and maintenance. The GPS system is subject to changes which could affect the accuracy and performance of all GPS equipment. WARNING: Traffic information is provided as an aid in visually acquiring traffic. Pilots must maneuver the aircraft based only upon ATC guidance or positive visual acquisition of conflicting traffic. The traffic information does not provide collision avoidance resolution advisories and does not, under any circumstances or conditions, relieve the pilots responsibility to see and avoid other aircraft. WARNING: Do not rely solely upon the traffic information to accurately depict all of the traffic within range of the aircraft. Due to lack of equipment, poor signal reception, and/or inaccurate information from aircraft or ground stations, traffic may be present that is not represented on the connected display. i 190-02087-00 Rev. AGarmin GDL 50(R)/52(R) Users Guide WARNING: Do not use the indicated data link weather product age to determine the age of the weather information shown by the data link weather product. Due to time delays inherent in gathering and processing weather data for data link transmission, the weather information shown by the data link weather product may be significantly older than the indicated weather product age. WARNING: To reduce the risk of unsafe operation, carefully review and understand all aspects of the GDL50(R)/52(R) Users Manual documentation and the Pilots Operating Handbook of the aircraft. Thoroughly practice basic operation prior to actual use. During flight operations, carefully compare indications from the GDL50(R)/52(R) to all available flight displays. For safety purposes, always resolve any discrepancies before continuing navigation. WARNING: The GDL50/52 contains a lithium-ion battery. To prevent damage, remove the unit from the aircraft or vehicle when exiting or store it out of direct sunlight. WARNING: When installing the GDL 50(R)/52(R) in an aircraft, place the unit securely so that it does not interfere with aircraft operating controls or obstruct the pilots view. WARNING: For safety reasons, GDL 50(R)/52(R) operational procedures must be learned on the ground. ii Garmin GDL 50(R)/52(R) Users Guide190-02087-00 Rev. A WARNING: When Navigating in an aircraft, use the GDL 50(R)/52(R) only as an aid for VFR navigation. WARNING: Use the GDL 50(R)/52(R) only as a navigational aid. Do not attempt to use the GDL 50(R)/52(R) for any purpose requiring precise measurement of direction, distance, location, or topography. This product should not be used to determine ground proximity for aircraft navigation. WARNING: This unit provides the ability to receive weather information through external sources. Use weather data only as an aid to situational awareness. Such weather information is merely supplemental and advisory in nature and is not intended to be relied upon as safety-critical information in connection with any aviation, vehicle, or marine usage. The user should always exercise caution and common sense when confronted with severe weather conditions. WARNING: Do not use data link weather information for maneuvering in, near, or around areas of hazardous weather. Information contained within data link weather products may not accurately depict current weather conditions. WARNING: The pressure altitude information provided by the GDL 50(R)/52(R) in a pressurized airplane will not be accurate. Use the connected display device to disable pressure information from the GDL 50(R)/52(R). iii 190-02087-00 Rev. AGarmin GDL 50(R)/52(R) Users Guide CAUTION: The Garmin GDL 50(R)/52(R) does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modifications could void both the warranty and the pilots authority to operate this device under FAA/FCC regulations. NOTE: Temporary Flight Restriction (TFR) data is provided by the FAA and may not be updated outside of normal business hours. Confirm data currency through alternate sources and contact the local FSS for interpretation of TFR data. NOTE: The GDL50(R)/52(R) has a very high degree of functional integrity. However, the pilot must recognize that providing monitoring and/or self-

test capability for all conceivable system failures is not practical. Although unlikely, it may be possible for erroneous operation to occur without a fault indication shown by the GDL50(R)/52(R). It is thus the responsibility of the pilot to detect such an occurrence by means of cross-checking with all redundant or correlated information available in the cockpit. NOTE: All visual depictions contained within this document, including images of the GDL 50(R)/52(R) and the bezel, displays, and screens of other products are subject to change and may not reflect the most current software or hardware. Depictions of equipment may differ slightly from the actual equipment. iv Garmin GDL 50(R)/52(R) Users Guide190-02087-00 Rev. A NOTE: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive harm. This notice is being provided in accordance with Californias Proposition 65. If you have any questions or would like additional information, please refer to our web site at www.garmin.com/prop65. v 190-02087-00 Rev. AGarmin GDL 50(R)/52(R) Users Guide FCC Compliance This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and may cause harmful interference to radio communications if not installed and used in accordance with the instructions. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and the receiver. Connect the equipment into an outlet that is on a different circuit from the GPS unit. Consult the dealer or an experienced radio/TV technician for help. vi Garmin GDL 50(R)/52(R) Users Guide190-02087-00 Rev. A