This thesis investigates the retention of the knowledge and skills on the Basic Offshore Safety and Emergency Training (B.O.S.E.T) which is compulsory for offshore professionals. Another aim is to identify the effectiveness of the B.O.S.E.T course. To identify the knowledge retention, test questionnaires were sent out to 119 respondents, including both first time and refresher trainees of the training programme. The questionnaire revolves around topics on Offshore Safety and Induction, Sea Survival and Helicopter Underwater Egress training (H.U.E.T). The questionnaires, designed to quantify the retention rate, were repeatedly administered every two (2) months over a period of six (6) months. The research also used role-play scenarios to identify skills retention among 38 participants. Analysis of the test data suggests that both the knowledge and skills retentions depreciate with time. However, the depreciation rate for skills (24%) is less significant than that for the knowledge (27%). Following this, it was established that knowledge and skills retention are associated with logarithmic function. Interestingly, the complexity of knowledge retention also demonstrates exponential function characteristics. This research has verified that the knowledge retention rates for Fresher and Refresher trainees are similar. The research concludes that the current B.O.S.E.T refresher system is not sufficed to ensure B.O.S.E.T knowledge is sustained at an acceptable level; hence more effort is needed to enhance B.O.S.E.T knowledge retention. A web-based solution was among several solutions proposed to enhance retention of B.O.S.E.T knowledge and skills.