Prior to assessment of final ultrasound clinical competency it is important to monitor clinical progress, provide high quality feedback and encourage skills development. The role of the supervisor, mentor and assessor are fundamental to the on-going progress monitoring of ultrasound trainees. This article forms the second part of a larger project which was to elicit ultrasound practitioners' opinions on how progress should be monitored, where and by whom. An on-line questionnaire was used to gain opinions from ultrasound practitioners. Totally, 116 responses were received from professionals with an interest in ultrasound assessment. Results suggested that experienced, qualified ultrasound practitioners should undertake the role of supervisor and assessor, having been prepared for that role by the training centre. Formative monitoring should take place both within the clinical department and possibly the training centre, using a range of methods. Following completion of the training, practitioners should have a preceptorship period to consolidate their knowledge and skills for 3 to 6 months or until further competencies have been demonstrated. Formative progress monitoring should be a recognised part of ultrasound training. Essentially, staff undertaking supervision and assessor roles should be supported and trained to ensure a high quality, consistent learning experience for ultrasound trainees. Additionally, they should provide appropriate feedback to the trainee and education centre.