WORLDWIDE ENC DATABASE WORKING GROUP (WENDWG) Report on global ENC coverage and observations on historic ENC overlaps from 2012 to 2017 Nigel Sutton UK WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018

Status of global ENC coverage The status of global ENC coverage could now be covered by agenda item 4.4 “reports by RHCs on the implementation of ENC Schemes” WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018

Observations on historic ENC overlaps from 2012 to 2017 Number of ENC overlaps from 2012 to 2016 highlighted at WENDWG7 Further statistical analysis undertaken to determine percentage of ENC overlaps by volume of ENCs per RHC region. Historically WENDWG monitored ENC overlaps by number of incidents This year, overlap figures 'RAG tested' against total ENCs per RHC region Boundaries set at: <1% Green 1% to 5% Amber >5% Red WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018

Observations on historic ENC overlaps from 2012 to 2017 <1% Green 1% to 5% Amber >5% Red WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018

Statistical assessment analysis Of 16 global Hydrographic Commissions: 9 are green with less than 1% of ENC overlaps 4 are amber with between 1% and 5% of ENC overlaps 3 are red with over 5% of ENC overlaps WENDWG may consider re-setting percentage overlap boundaries what is an acceptable minimum (green) ENC overlap percentage? what is an acceptable maximum (Red) ENC overlap percentage? WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018

WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018 Recommendations WENDWG is invited to consider: whether the status of global ENC coverage should be discussed under Agenda item 4.4 - Reports by RHCs on the implementation of ENC Schemes? whether the establishment of minimum and maximum overlap targets could encourage the reduction and timely resolution of ENC overlaps? whether input from RENCs and RHC representatives is required to determine, highlight and grade the navigational significance of global ENC overlaps? WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018

Actions requested of WENDWG/IRCC WENDWG is invited to note the report and recommendations WENDWG-8, Buenos Aires, Argentina 20 – 22 March 2018