Track 7, Tribology of Extreme Environments: Aerotribology, Ocean Tribology and Space Tribology, brought attention to ocean-related tribology through twooral presentations: one on underwater drag reduction using superwetted groovesurfaces, and another on the seawater-lubricated performance of a carbon-coatedsteel used in oil and gas injection valves. Posters also addressed abrasive wear in offshore applications and the friction and wear of steel in seawater. Relatedtribocorrosion studies of protective coatings were presented in other tracks, highlighting the breadth of research addressing materials and surfaces in marine environments.