Search for places, lights, buoys, and chart features from the search bar in the header. Use Visible Area to find nav aids on screen (e.g. "G 9"), or Everywhere to search globally by name.

Click and drag to move the chart. Use the scroll wheel or pinch to zoom in and out. This is the default tool.

Click anywhere on the chart to get its latitude and longitude. You can also type coordinates into the input field and press Enter to jump to that location. Supports decimal degrees, degrees-minutes, and DMS formats.

Select the Draw tool to open the sub-panel with shape modes:

• Point: Click the chart to drop a marker. Shows coordinates below it. Drag to reposition. Click the coordinate label to type exact coordinates and press Enter.
• Line: Click twice to place two endpoints. Shows distance and bearing at the midpoint, with coordinate labels at each end. Drag either endpoint to adjust. Click the coordinate labels to edit positions, or click the distance/bearing label to type new values (moves the second point).
• Circle: Click once to set the center, click again to set the radius. Shows radius and center coordinates. Drag the center to reposition. Click the radius label to type an exact radius, or click the coordinate label to edit the center position.
• Editing: All drawn items can be dragged to new positions. Click any label to edit its value in a popup. Right-click any point to delete that drawing.
• Clear: Use the Clear button in the sub-panel to remove all drawings at once.

Build multi-leg routes with distance, bearing, and time estimates:

• Add waypoints: Click the chart to place numbered waypoints. Each leg displays its distance and bearing.
• Drag waypoints: Drag any numbered waypoint to adjust its position. The route updates in real time.
• Insert waypoints: Click the + icon at the midpoint of any leg to insert a new waypoint. You can also click directly on the route line to insert at that spot.
• Delete waypoints: Right-click any waypoint to remove it from the route.
• Route details: Click the route summary bar at the bottom (showing total distance) to open the Route Details modal. This shows a full table with each leg's position, distance, bearing, cumulative distance, and ETA (if speed is set in Settings).
• Export: In the Route Details modal, click Export CSV to download the route table as a spreadsheet file.
• Delete route: Click Delete Route in the modal, or the × button on the summary bar, to clear the entire route.

Routes persist when switching tools — switch to Pan or Info and your route stays on the chart.

Click on any chart feature to identify it. Shows detailed information about buoys, lights, beacons, depth areas, wrecks, obstructions, and other S-57 ENC features including their characteristics and attributes.

Toggle NOAA Coast Pilot markers on the chart. These provide detailed navigation guidance, harbor descriptions, anchorage information, and local knowledge from the official U.S. Coast Pilot publications. Zoom in to see markers.

Opens a reference guide showing all chart symbols used on NOAA ENC charts, including lateral marks, daybeacons, cardinal marks, lights, hazards, depth markings, and shoreline features.

Configure distance units (NM, km, miles), coordinate format, bearing reference, chart layer visibility and opacity, vessel draft and safety depth, speed for route time estimates, and boat name.

Centers the chart on your current position using your device's GPS. Your location is shown with a blue marker and accuracy circle. Tap again to re-center if you've panned away. Located in the bottom-right corner of the map.