You may want to know which locations have hydrophone data. You can find all of the locations using ONC's Instruments and Cables Web App.
Step-by-step guide
- Load the Instruments and Cables Web App: https://www.arcgis.com/apps/webappviewer/index.html?id=af2350131ebe498381a326793b870a20
- Wait for the web app to load, then open the slide-up tray from the bottom of the window
- Choose the ONC Instruments tab, then deselect Filter by Map Extent
- Choose Options - Filter
- In the pop-up window select + Add Expression
- Define the first 2 dropdowns in the filter expression: "devicecategoryname (String)", "is any of"
- Search in the 3rd dropdown for "hydrophone" and select that category
- The map will be filtered to show only nodes and hydrophone instruments - you can pan and zoom to select the geographic extent of interest
- The hydrophones will also be listed in the table displayed in the slide-up tray