The MCIB commenced investigations into eight marine casualties in 2021, all of which occurred in 2021. No lives were lost in any of the marine casualties under investigation.

A further 68 incidents were considered by the Board which involved co-operation between the MCIB and the accident investigation bodies of other states. These incidents were in general considered to be minor in nature and not warranting investigation by the MCIB or were incidents where investigations were being conducted by the flag state. Some cases required the uploading of data by Ireland onto the European Maritime Casualty Investigation Platform (EMCIP)1.