: This is a study of inter-organisational exercises arranged by on-shore organisations (ONSOs)and off-shore organisations (OFFSOs). The aim was to compare findings from trained emergencystaffs' perceptions of the impact of exercises. The data were retrieved from surveys conducted bythe research team in conjunction with exercises. The surveys included staff from the coast guard,sea rescue, police department, fire department and ambulance services. A total of 94 professionalemergency personnel participated in the ONSO exercises and 252 in the OFFSO exercises. The studywas based on the suggestion that collaborative elements during an inter-organisational exercisepromote learning, and learning is important to make the exercises useful. Collaboration proved to bea predictor for some of the items in learning, and learning was a predictor for some of the items inutility. There was, however, a stronger covariation between collaboration, learning and utility in theOFFSOs exercises than in the ONSOs. One reason might be the different cultures of emergency staffinvolved in on-shore and off-shore organisations. The OFFSOs' qualifications may be dominated byseamanship, together with professional practice, and all parties are expected to act as first responders.ONSOs, on the other hand, practice exercises from a strict professional and legal perspective.