A study examined the clinical influences on the instructional planning decisions made by registered nurses who are lecturers in basic nursing at colleges of advanced education (CAEs) in New South Wales, Australia. Data were collected from a questionnaire that was completed by 98 nurse-academics from 12 of New South Wales' 15 CAEs offering basic nursing courses and from interviews of 14 nurse-academics from 4 of the 15 CAEs that were selected as being representative of CAEs offering basic nursing in New South Wales. The nurse-academics were asked about the factors influencing their instructional planning decisions. Statistical analyses were performed to determine the significance and identify trends. The following factors were identified as the main influences on selection of a system of supervision: type of nursing; geographical placement of students in the hospital; students' level; and number of students in the lecturers' charge. Lecturers did much less advance planning for clinical teaching in clinical facilities than for lectures, tutorials, or nursing laboratories. Seven of 11 nurse-academics interviewed mentioned wanting to produce "safe" nurses. Extrainstitutional clinical factors did not directly affect nurse-academic teaching in lectures and tutorials but did have a direct effect on teaching in the extrainstitutional clinical facilities themselves. (Contains 28 references.) (MN)