The document summarizes the process of upgrading inland electronic navigational charts (ENCs) with depth information in Croatia. It describes the equipment used to collect depth data, including single-beam echosounders and multibeam sonar, and the software tools used to process and produce the ENCs. It provides an example of a test stretch where depth measurements were taken between river kilometer marks 1320 and 1305, and concludes that while both single-beam and multibeam systems can be used, multibeam is recommended for critical sections due to its improved accuracy of depth measurements.

1. Newada Duo
Act. 4.1 – Upgrading of IENC with depth information
Croatia – Agency for Inland Waterways
Damir Obad
Regensburg 14.05.2014.

2. Agenda:
• ENC production process
• Sample ENC
• Conclusion

3. ENC Production Process
• Equipment used:
• Reson Navisound 110 – singlebeam echosounder
• ELAC SEA BEAM 1185 - MULTIBEAM SONAR

4. ENC Production Process
• Cross sections every 50m (single beam)
• dGPS provided by national system CROPOS or
reference stations every 5 km along the river
• Software tools used:
• AutoCAD / PDS 2000 for post processing
• 7C’s tools for ENC production
• DXF Converter
• ENC Designer
• ENC Optimizer
• ENC Analyzer

5. Agenda:
• ENC production process
• Sample ENC
• Conclusion

6. Sample ENC
• Test stretch defined rkm 1320 to rkm 1305
• Rocky bottom of the river bed
• Training works planned
• Single beam 1320-1305
• Multi beam 1310-1308 (measurements ongoing)

12. Agenda:
• ENC production process
• Sample ENC
• Conclusion

13. Conclusion
• Depth information definitely brings added value
to the ENCs
• Single beam vs. Multi beam
• Multi beam definitely recommended for the critical
sections
• Single beam usable for the non critical sections
• Full coverage with the depth data???

14. Thank You!
Damir Obad
RGO komunikacije
obad@rgo.hr
+385 91 5181 696