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Observed current:
Ebb&Flow scale:
3 kts
this station
Observed current. Speed and direction from NOAA CO-OPS server.
Harmonic station. Speed and direction from NOAA CO-OPS server.
Subordinate station. Speed from XTide, at mean ebb or flood direction.
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Track Measurements

Distance Course
Full Path mi km nm ° true ° mag
Current Segment mi km nm ° true ° mag

Path Latitude, Longitude Magnetic Correction
From °
To  
 

Add a point to the track

Measuring distance along a track

Follow the instructions below to draw a track on the map. The distance along the track, the coordinates of the endpoints, and the compass direction between the endpoints will appear in the table above as you draw.

Start drawing by clicking anywhere on the map. A rubber-band line will follow the cursor as you draw.

  • Click to add another point
  • Hold down the Shift key as you move the mouse (without pressing the mouse button) to automatically add points along the path that you trace.
  • Use the Delete/Backspace key to delete the last point.
  • To finish the track, either double-click the final point, or type Enter/Return.
  • To finish the track without adding the current rubber-band segment, type Escape.

Once you've finished drawing the track, the rubber-band line disappears. You'll see solid white circles at all the bends, and translucent white circles between them.

  • To refine the track, drag any of the white circles. Dragging a solid white circle repositions an existing bend or endpoint. Dragging a translucent white circle creates a new bend.
  • To extend the track without moving any of the existing bends, drag either endpoint a short distance, release, and continue drawing.
  • To delete the bend at a solid white circle, either double-click it, or mouse over it while holding down the Delete/Backspace key.
  • Click the Start Over button, or double-click anywhere outside of the track, to erase the current track and start a new one.

In addition to the data in the table, a popup on the map also displays the distance along the path, and the length and compass direction of its last segment. You can enable or disable this popup using the Show Info checkbox, or by pressing the I key. To show the length and compass direction of a segment other than the last, click the white circle of its endpoint or midpoint.

Working with GPS Coordinates

If you want to know the GPS coordinates of a point on the map, just hover the cursor over it. The coordinates will appear in the From box of the table. Or (e.g. on a touch-screen device), double-tap the point. It will be drawn on the map as a zero-length track, and its coordinates will appear in the table.

If you have GPS coordinates of a point and you want to see where it is on the map, enter them in the Add a point to the track box. The point will be drawn on the map as a zero-length track. The format must be latitude, longitude, where latitude is a decimal number between -90.0000 and 90.0000, and longitude is a decimal number between -180.0000 and 180.0000 . At any time, you may use the Add a point to the track box to manually enter a GPS coordinate instead of clicking a point.

If you switch to another tab (e.g. Tides or Weather) the track will temporarily disappear from the map, but it will come back again when you switch back to the Measure tab.

The Trip Planner has two main sections: the Map and the Info Panel. In a desktop or tablet browser, the Map is on the left and the Info Panel is on the right. In a mobile phone browser, only the Info Panel is visible at first. The Help text that you are reading now is in the Info Panel.

Tapping the Map button near the upper-right corner of the Info Panel switches to Map View, in which only the map is visible. From Map View, tapping the blue button in the upper-right corner brings back the Info Panel.

Click on any item below to read more about it.

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