Astronauts aboard the Space Shuttle Discovery used the sunglint off the surface of the Mediterranean Sea to reveal biogenic films on the ocean surface. (''Biogenic film'' refers to a thin layer of biologically-produced film resting on the surface. Click for daac.gsfc.nasa.gov/CAMPAIGN_DOCS/OCDST/shuttle_oceanography_web/oss_134.html more details .) The films dampen surface capillary waves, creating brighter and darker reflections, which, in turn, trace the complex surface water movements along the coast. The sunglint also highlights coastal features (jetties, submerged coastal areas) near the /IOTD/view.php?id=1495 Port of Suez.