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 < >. 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.

2 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. 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.

3 1 Headquarters Department of the army Washington, DC, 1 March 2016 Engineer Reconnaissance Contents Page v INTRODUCTION .. 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 .. 4-1 Route Classification .. 4-1 Curve Calculations .. 4-6 Underpasses .. 4- 15 Tunnels on Routes .. 4- 15 Road Reconnaissance .

4 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 .. 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.

5 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 .. 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.

6 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 ..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.

7 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. 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.

8 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 .. 4- 13 Table 4-4. Principle soil types .. 4- 20 Table 4-5. Soil characteristics of roads and airfields .. 4- 21 Table 4-6. Engineering properties of soil types .. 4- 23 Table 4-7. Wheeled vehicle classification related to single wheel load .. 4- 24 Table 4-8. Symbols for limiting characteristics .. 4- 25 Table 4-9. Symbols for type of surface materials .. 4- 25 Table 4-10. Examples of the road classification format .. 4- 26 Table 5-1. Status color coding of infrastructure categories .. 5- 12 Table A-1. Metric conversion chart .. A-1 Table B-1. Route classification symbols .. B-1 Table B-2. Engineer Reconnaissance B-4 Table B-3. Minimum roadway widths .. B- 17 Table B-4. Span construction types .. B- 17 Table B-5. Construction material .. B- 19 Table C-1. Infrastructure assessment considerations.

9 C-3 Table F-1. Typical hazard, regulatory, and guide signs .. F-1 1 March 2016 ATP v Preface ATP provides techniques for the performance of tactical and technical Engineer Reconnaissance in support of military activities that are conducted across the full range of military operations. This publication supports doctrine found in ADP 3-0, FM 3-34, ADRP 5-0, and ADRP 6-0. Although primarily oriented on the brigade combat team (BCT)/regimental combat team (RCT) based Marine air-ground task force (MAGTF) and below, the principal audience for ATP is all members of the profession of arms. Commanders and staffs of army and Marine Corps headquarters serving as joint task force or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the army and Marine Corps will also use this publication.

10 Commanders, staffs, and subordinates ensure that their decisions and actions comply with applicable United States ( ), international and, in some cases, host-nation laws and regulations. Commanders at all levels ensure that their personnel operate according to the law of war and the rules of engagement. (See FM 27-10.) Unless this publication States otherwise, masculine nouns and pronouns do not refer exclusively to men. Appendix A contains a metric conversion chart for the measurements used in this publication. For a complete listing of preferred metric units for general use, see Fed-Std-376B. ATP uses joint terms where applicable. Selected joint and army terms and definitions appear in both the glossary and the text. Terms for which ATP is the proponent (the authority) are italicized in the text and are marked with an asterisk (*) in the glossary. Terms and definitions for which ATP is the proponent publication are boldfaced in the text.