# Appendix C - Acknowledgements ISCWSA – Collision Avoidance Calculations – Current Common Practice ISCWSA – Error Model Revisions – Steve Grindrod – 08/10/09 ISCWSA – Standards – Hugh Williamson – 28/02/01 MWD TOOLFACE INDEPENDANT ERROR TERMS – Copesgrove Developments Ltd – 04/11/09 SPE9223 – BOREHOLE POSITON UNCERTAINTY, ANALYSIS OF MEASURING METHODS AND DERIVATION OF SYSTEMATIC ERROR MODEL – C.J.M Wolff, J.P. de Wardt SPE11382 – CALCULATION OF NMDC LENGTH REQUIRED FOR VARIOUS LATITUEDS DEVELOPED FROM FIELD MEASUREMENTS OF DRILL STRING MAGNETISATION – S.J. Grindrod, J.M. Wolff – 20/02/83 SPE18051 – INSTRUMENT PERFORMANCE MODELS AND THIER APPLICATION TO DIRECTIONAL SURVEYING OPERATIONS –John L. Thorogood – 1990 SPE21261 – SIMPLIFIED EQUATIONS FOR PLANNING DIRECTIONAL AND HORIZONTAL WELLS –M.L. Wiggins, H.C. Juvkam Wold – 02/11/90 SPE36863 – AN IMPROVED METHOD FOR COMPUTING WELLBORE POSITION UNCERTAINTY AND ITS APPLICATION TO COLLISION AND TARGET INTERSECTION PROBABILITY ANALYSIS – Andrew G. Brooks, Harry Wilson – 22/10/96 SPE67616 – ACCURACY PREDICTION FOR DIRECTIONAL MEASUREMENT WHILE DRILLING – H.S. Williamson – 01/12/00 SPE84246 – A COMPENDIUM OF DIRECTIONAL CALCULATIONS BASED ON THE MINIMUM CURVATURE METHOD – S.J. Sawaryn, J.L. Thorogood – 01/03/05 SPE90408 – PREDICTION OF WELLBORE POSITION ACCURACY WHEN SURVEYED WITH GYROSCOPIC TOOLS – Torgeir Torkildsen, Stein T. Havardstein, John Weston, Roger Ekseth – 01/03/08 SPE110014 - A COMPENDIUM OF DIRECTIONAL CALCULATIONS BASED ON THE MINIMUM CURVATURE METHOD: PART 2 – S.J. Sawaryn – 11/11/07 --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.innova-drilling.com/introduction/legacy-documentation/manuals/well-seeker-pro-1/appendix-c-acknowledgements.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.