Engineer Reconnaissance - United States Army

1 ATP 3- Engineer Reconnaissance MARCH 2016 DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited. This publication supersedes FM , 25 March 2008. Headquarters, Department of the army FOREWORD This publication has been prepared under our direction for use by our respective commands and other commands as appropriate. JAMES H. RAYMER Brigadier General, USA Commandant army Engineer School ROBERT S. WALSH Lieutenant General, USMC Deputy Commandant for combat Development and Integration This publication is available at army Knowledge Online < >. To receive publishing updates, please subscribe at < >.

2 It is also available at the Marine Corps Web site at Marine Corps Doctrine at < , C1 Headquarters Change 1 army Techniques Publication No. ATP Department of the army Washington, DC, 30 January 2017 Engineer Reconnaissance change corrects the spelling of cord to chord. It also corrects formulas used in chapter A bar ( | ) marks new or changed is changed as follows:Remove Old Pages _____ Insert New Pages_____ ii4-7 through 4-9 ii4-7 through 4-9 4. File this transmittal sheet in front of the publication for reference RESTRICTION: Approved for public release; distribution is unlimited.

3 This page intentially left Order of the Secretary of the army : MARK A. MILLEYG eneral, United States army Chief of Staff Official: GERALD B. O KEEFE Administrative Assistant to the Secretary of the army 1701811 DISTRIBUTION: Active army , army National Guard, and United States army Reserve: Distributed in electronic media only (EMO). ATP , C1 MCWP 30 January 2017 PCN: 14300015600 PIN: 106039 001 This page is intentionally left blank.*ATP Restriction: Approved for public release; distribution is unlimited. *This publication supersedes FM , 25 March March 2016 ATP i army Techniques Publication No. 1 Headquarters Department of the army Washington, DC, 1 March 2016 Engineer Reconnaissance Contents Page v INTRODUCTION.

4 Vi Chapter 1 Engineer Reconnaissance FRAMEWORK .. 1-1 Engineer Reconnaissance Tasks .. 1-1 Engineer Reconnaissance Team Capabilities and Limitations .. 1-4 Command and Support Relationships .. 1-7 Sustainment Considerations .. 1-8 Chapter 2 Engineer SUPPORT TO INFORMATION COLLECTION/INTELLIGENCE, SURVEILLANCE, AND Reconnaissance .. 2-1 Planning .. 2-1 Staff Support .. 2-1 Reconnaissance .. 2-2 Chapter 3 Reconnaissance SUPPORT .. 3-1 Support to Mobility .. 3-1 Support to Countermobility .. 3-8 Support to Survivability .. 3-9 Support to Other Environments and 3-9 Support to Other Reconnaissance Types .. 3- 18 Chapter 4 TECHNICAL Reconnaissance ROUTE CLASSIFICATION.

5 4-1 Route Classification .. 4-1 Curve Calculations .. 4-6 Underpasses .. 4- 15 Tunnels on Routes .. 4- 15 Road Reconnaissance .. 4- 18 Base Course and Subgrade .. 4- 22 Chapter 5 TECHNICAL Reconnaissance ASSESSMENTS AND SURVEYS .. 5-1 Bridge Reconnaissance .. 5-1 Marine Corps Warfighter PublicationNo. ii ATP , C1 30 January 2017 Other Gap-Crossing Sites .. 5-2 Engineer Resource Assessment .. 5- 10 Infrastructure Reconnaissance .. 5- 10 Environmental Reconnaissance .. 5- 16 Airfield 5- 16 Appendix A METRIC CONVERSION CHART .. A-1 Appendix B REPORTING .. B-1 Appendix C INFRASTRUCTURE Reconnaissance .. C-1 Appendix D MILITARY LOAD D-1 Appendix E TECHNICAL TOOLS AND RESOURCES.

6 E-1 Appendix F SIGNS .. F-1 GLOSSARY .. Glossary-1 REFERENCES .. References-1 INDEX .. Index-1 Figures Figure 1-1. Range of Engineer Reconnaissance capabilities .. 1-2 Figure 2-1. Route Reconnaissance graphic control measures .. 2-5 Figure 2-2. Zone Reconnaissance graphic control 2-7 Figure 2-3. Area Reconnaissance graphic control measures .. 2-8 Figure 4-1. Route classification overlay .. 4-3 Figure 4-2. Route widths .. 4-5 Figure 4-3. Tape-measure method .. 4-7 Figure 4-4. Triangulation method .. 4-8 Figure 4-5. Chord method .. 4-9 Figure 4-6. Curve symbols .. 4-9 Figure 4-7. Percent of slope format .. 4- 10 Figure 4-8. Map method to determine percent of slope.

7 4- 11 Figure 4-9. Pace method to determine percent of slope .. 4- 12 Figure 4-10. Angle-of-slope method to determine percent of slope .. 4- 13 Figure 4-11. Percent-of-slope symbols .. 4- 14 Figure 4-12. Route construction symbol .. 4- 14 Figure 4-13. Underpass symbols .. 4- 15 Figure 4-14. Types of tunnel bores .. 4- 16 Figure 4-15. Tunnel symbols .. 4- 16 Figure 4-16. Overhead clearance measurements .. 4- 17 Figure 4-17. Dimensions required for tunnels .. 4- 18 Figure 4-18. Portal view of tunnel .. 4- 19 Figure 4-19. Parts of a road .. 4- 19 Contents 1 March 2016 ATP iii Figure 4-20. Load bearing capacity of roads with a flexible surface.

8 4- 22 Figure 5-1. Telltale .. 5-2 Figure 5-2. Ford symbols .. 5-4 Figure 5-3. Ferry symbols .. 5-6 Figure 5-4. Sample ferry 5-6 Figure 5-5. Dimensions required for streams and rivers .. 5-7 Figure 5-6. Compass method to measure width of stream .. 5-8 Figure 5-7. Measuring gap width with a surveying instrument .. 5-8 Figure 5-8. Finding stream velocity .. 5-9 Figure 5-9. Assessment overlapping survey .. 5- 11 Figure 5-10. Airfield damage categories .. 5- 17 Figure B-1. Sample DD Form 3009 ..B-5 Figure B-2. Sample DD Form 3010 ..B-12 Figure B-3. Sample DD Form 3011 ..B-15 Figure B-4. Typical bridge spans ..B-18 Figure B-5. Sample DD Form 3012.

9 B-20 Figure B-6. Sample DD Form 3013 ..B-23 Figure B-7. Sample DD Form 3014 ..B-26 Figure B-8. Sample DD Form 3015 ..B-29 Figure B-9. Engineer resource symbols ..B-31 Figure B-10. Sample DD Form 3016 ..B-33 Figure C-1. The infrastructure assessment and survey model .. C-1 Figure E-1. ENFIRE components ..E-4 Figure F-1. Hazard signs not included in the Geneva F-2 Figure F-2. Hazard signs included in the Geneva Convention .. F-3 Figure F-3. Warning and enforcement signs .. F-3 Figure F-4. Bridge signs .. F-4 Figure F-5. Width and height signs .. F-5 Figure F-6. Bridge sign containing technical information .. F-5 Figure F-7. Typical multilane bridge F-6 Figure F-8.

10 Indicators of a damaged bridge .. F-6 Figure F-9. Military route guide signs for axial routes .. F-7 Figure F-10. Directional disks .. F-8 Figure F-11. Guide signs for casualty evacuation routes .. F-8 Figure F-12. Unit direction arrow .. F-9 Figure F-13. Military detour signs .. F-9 Figure F-14. Front sign .. F- 10 Contents iv ATP 1 March 2016 Tables Introductory table-1. Modified army and Marine Corps terms .. vii Introductory table-2. Rescinded army and Marine Corps terms .. vii Table 4-1. Examples of the route classification format .. 4-4 Table 4-2. Traffic flow capability based on route width .. 4-6 Table 4-3. Conversion of degrees and mils to percent of slope.