Our very own Denise Hardesty and Lauren Roman were lead authors on the following UN and COBSEA collaboration. 

The guidelines provide Regional Guidance on Harmonized National Marine Litter Monitoring
Programmes to strengthen and harmonize marine litter monitoring efforts toward preventing and
reducing marine litter and its impacts, in line with the COBSEA Regional Action Plan on Marine Litter
(RAP MALI). The review responds to the needs identified by COBSEA participating countries,
incorporates country contributions, and builds on existing capacities and priorities, to promote data
comparability and align efforts at regional and global level.

The guidelines can be accessed here.