Why doesn the link I made to my graph work any more?
If you generate a graph at the tide site, it only exists for a few minutes (or we’d quickly run out of disk space). If you’d like to be able to look at the graph again, copy it to your local disk. Details of doing this differ between browsers, but may be something like clicking the right mouse button over the image (for the Mac this might be option-button, ctrl-button, or something similar) to get a property menu, then select “Save image as…” (or something similar). Now you’ve got a copy of it on your own hard drive after our copy evaporates.
