Report on global ENC coverage

The report by the WORLDWIDE ENC DATABASE WORKING GROUP (WENDWG) presents findings on global ENC coverage from 2012 to 2017, along with insights on historic ENC overlaps. It includes data on the number of overlaps by volume, statistical analysis by RHC region, and monitoring of overlaps against total ENC figures. The document discusses the percentage of overlaps categorized as Green, Amber, or Red and provides a comprehensive overview of the status of global ENC coverage.

• ENC
• WENDWG
• Global Coverage
• Historic Overlaps
• Hydrography

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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 International Hydrographic Organization Organisation Hydrographique Internationale 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 International Hydrographic Organization Organisation Hydrographique Internationale 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 International Hydrographic Organization Organisation Hydrographique Internationale WENDWG-8, Buenos Aires, Argentina 20 22 March 2018

4. Observations on historic ENC overlaps from 2012 to 2017 2012 2013 2014 2015 2016 2017 RHC ARHC BSHC EAHC EAtHC HCA MACHC MBSHC NHC NIOHC NSHC RSAHC SAIHC SEPHC SWAtH SWPHC USCHC RHC ENCs Overlaps % overlaps by Vol RHC ENCs Overlaps % overlaps by Vol RHC ENCs Overlaps % overlaps by Vol RHC ENCs Overlaps % overlaps by Vol RHC ENCs Overlaps % overlaps by Vol RHC ENCs Overlaps % overlaps by Vol 584 36 6.16% 626 14 2.24% 647 20 3.09% 1045 67 6.41% 1078 36 3.34% 1084 14 1.29% 2288 294 12.85% 2420 133 5.50% 2818 177 6.28% 321 6 1.87% 331 2 0.60% 353 3 0.85% 70 2 2.86% 90 1 1.11% 93 1 1.08% 504 34 6.75% 548 15 2.74% 613 4 0.65% 1304 268 20.55% 1289 120 9.31% 1320 99 7.50% 1945 71 3.65% 1980 35 1.77% 2003 30 1.50% 402 115 28.61% 404 33 8.17% 416 10 2.40% 2097 71 3.39% 2149 21 0.98% 2174 10 0.46% 140 16 11.43% 141 7 4.96% 145 3 2.07% 194 2 1.03% 202 0 0.00% 206 1 0.49% 322 4 1.24% 322 2 0.62% 333 2 0.60% 240 8 3.33% 247 2 0.81% 261 4 1.53% 1110 26 2.34% 1171 8 0.68% 1245 8 0.64% 1593 171 10.73% 1632 42 2.57% 1742 46 2.64% 650 1090 3189 398 106 661 1421 2037 430 2248 150 206 345 283 1279 1859 9 1.38% 16 1.47% 241 7.56% 3 0.75% 4 3.77% 5 0.76% 100 7.04% 8 0.39% 18 4.19% 16 0.71% 17 11.33% 1 0.49% 2 0.58% 4 1.41% 2 0.16% 19 1.02% 692 1164 3652 429 117 706 1490 2111 440 2351 159 205 381 287 1308 1990 9 1.30% 16 1.37% 253 6.93% 0 0.00% 3 2.56% 4 0.57% 96 6.44% 4 0.19% 21 4.77% 23 0.98% 11 6.92% 4 1.95% 1 0.26% 4 1.39% 6 0.46% 22 1.11% 742 1,120 3,996 463 128 837 1,589 2,209 460 2,485 197 232 457 327 1,427 2,141 11 1.48% 19 1.70% 237 5.93% 4 0.86% 5 3.91% 3 0.36% 94 5.92% 7 0.32% 17 3.70% 20 0.80% 10 5.08% 2 0.86% 1 0.22% 0 0.00% 5 0.35% 18 0.84% Total Relased ENCs 14159 11524 1,191 8.41% 14630 11952 471 3.22% 15453 12730 432 2.80% 16352 13589 465 2.84% 17482 14617 477 2.73% 18,810 15,469 453 2.41% <1% Green 1% to 5% Amber >5% Red International Hydrographic Organization Organisation Hydrographique Internationale 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? International Hydrographic Organization Organisation Hydrographique Internationale WENDWG-8, Buenos Aires, Argentina 20 22 March 2018

6. 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? International Hydrographic Organization Organisation Hydrographique Internationale WENDWG-8, Buenos Aires, Argentina 20 22 March 2018

7. Actions requested of WENDWG/IRCC WENDWG is invited to note the report and recommendations International Hydrographic Organization Organisation Hydrographique Internationale WENDWG-8, Buenos Aires, Argentina 20 22 March 2018