Seaports, waterways and climate are inextricably linked. Weather anomalies change bottom contours and destroy aids to navigation compromising safety. In the past decade, maritime applications, maturing marine technologies and crowdsourcing have given mariners access to near-real-time hydrographic data. The 3D Forward-looking Sonar is one example of the technology navigators are using today to create their own 3D local chart database. Thousands of vessel operators are now contributing to online navigation safety databases. This article provides examples of how traditional hydrographic data sourcing continues to change in the wake of apps, intra-vessel communication and 3D sonar hardware/software technology.