| 41 |  | || '''Projection''' || '''Use-Case''' || ''' proj.4 string (output-projection)''' || | 
                        | 42 |  | || British National Grid || all British flights || +init=epsg:27700 +nadgrids=/users/rsg/arsf/usr/share/proj/OSTN02_NTv2.gsb +geoidgrids=/users/rsg/arsf/usr/share/proj/osgm02_wgs.gtx|| | 
                        | 43 |  | || UTM || everywhere else || +proj=utm +zone='''<zone number>*''' +ellps=WGS84 +datum=WGS84 || | 
                      
                        |  | 41 | || '''Projection''' || '''Use-Case''' || '''output-projection''' || | 
                        |  | 42 | || British National Grid || all British flights || ukbng || | 
                        |  | 43 | || UTM || everywhere else || utm zone='''<zone number>''' hemisphere='''<n/s>''' hrz_datum=wgs84 vrt_datum=wgs84 || |