Case studies of the contemporary UK sail training movement are used to illustrate the competing expressions of purpose in this field. Two sail training organisations are described and a case study voyage under the aegis of each is presented. The differences between the approaches are analysed as "traditions" or ideologies, articulated through distinctive interpretations of power and contrasting approaches to participation in decision making. It is argued that choices regarding the type of vessel used and the voyages made are not neutral technical decisions but have ideological significance. In conclusion the application of such an analysis to other kinds of outdoor and adventure education is considered.