4.1 ISO 6954:1984 Guidelines
for the overall evaluation of vibration in merchant ships have been
superseded by ISO 6954:2000. At the time of writing (2006) the latter
version remains to be widely adopted. This reflects the considerable
experience which exists among shipowners, shipbuilders, operators
and Classification Societies with regard to the application and interpretation
of the earlier version. This suggests that ISO 6954:1984 will remain
in general use as a specification requirement until confidence has
been established in ISO 6954:2000.
4.2 Assessment criteria
and limits for both standards are given below. The measurement parameters,
frequency range, analysis methods, and severity criteria are different
for the two versions and care must be taken to define which one is
being used.