Satelite image of <a href="https://en.wikipedia.org/wiki/Gulf_of_Tonkin" class="extiw" title="en:Gulf of Tonkin">Gulf of Tonkin</a>.
NASA
2001-11-16
NASA Visible Earth. cropped from <a rel="nofollow" class="external free" href="http://visibleearth.nasa.gov/view_rec.php?id=2301">http://visibleearth.nasa.gov/view_rec.php?id=2301</a>