Ship measurements. Titanic: 883 feet long, 93 feet wide, 46,329 gross registered tons; Icon of the Seas: 1,196 feet long, 219 feet wide, 248,663 gross registered tons; Find out more about Royal ...

Using data from historic ship measurements and Argo floats, researchers introduced a machine learning technique that improves assessment and analysis of the ocean's declining oxygen levels.

They used a dataset of historical, ship-based oxygen observations since the 1960s and recent data from Argo floats — autonomous drifting devices that collect and measure temperature and salinity.