Number of environmental related deficiencies and/or non-conformities (excluding operational-, navigational-, HR-, security-, health and safety deficiencies) including any substandard act, practice or condition of an environmental consequence (local regulations and MARPOL) recorded during external inspections and audits by external bodies (class, port state, flag state, underwriters, ITF) including statutory audits, but excluding other voluntary inspections made for the purpose of quality improvement or for commercial reasons, such as SIRE, CDI or other charterer inspections. This source provides an example of how the indicator can be developed.