1. 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

2. 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

3. 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

4. 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

5. 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

6. 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 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

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