Redrawn based on
<p>page:
OUR RESTLESS TIDES
National Ocean Service <a href="//commons.wikimedia.org/wiki/NOAA" class="mw-redirect" title="NOAA">NOAA</a>
<a rel="nofollow" class="external free" href="http://co-ops.nos.noaa.gov/restles4.html">http://co-ops.nos.noaa.gov/restles4.html</a>
figure:
</p>
<a rel="nofollow" class="external free" href="http://co-ops.nos.noaa.gov/images/restfig6.gif">http://co-ops.nos.noaa.gov/images/restfig6.gif</a>
<a href="//commons.wikimedia.org/wiki/User_talk:Snubcube" title="User talk:Snubcube">Snubcube</a>
2013-10-12 11:05:51
<span class="int-own-work" lang="en">Own work</span>