The purpose of Sentinel is to minimise the risk of untrained personnel from carrying out safety critical work on the railway. The scheme allows sponsors to manage the computerised records of individual training/competencies and the production, distribution and control of associated competency cards.

The NCCA system also provides a support structure to Yellow Rail’s own formal competency management system.

As part of the accreditation, Yellow Rail is able to sponsor PTS staff where required to undertake the delivery of projects.