 The Mosaic project deployed a network of autonomous boys around the Arctic Ocean to study the effects of climate change on sea ice. The boys collected data over a one-year period, providing valuable information about the movement of sea ice. This dataset contains 216 high-quality drift tracks spanning the entire time frame of the project. These tracks can be used to study the dynamics of sea ice motion at different scales, from hundreds of meters to hundreds of kilometers. This article was authored by Angela C. Bliss, Jennifer K. Hutchings, and Daniel M. Watkins.