Arguments and documentation from referencing only being able to compare IMO numbers to being able to compare any field (i.e. -imo-field --> -compare-field and -if --> -cf
Arguments and documentation from referencing only being able to compare IMO numbers to being able to compare any field (i.e. -imo-field --> -compare-field and -if --> -cf

SkyTruth/pelagos-data,SkyTruth/pelagos-data