Recognizing that it is not currently possible at the design stage to predict maneuvering characteristics with su¢cient accuracy, the primary concern of the IMO Sub-Committee was that a ship - even though predicted to be in compliance with the standards by employing the best prediction method available - might fail to do so on trials and then be disqualified. The IMO Sub-Committee agreed that it would be permissible to demonstrate compliance with the standards by predicting trial performance through model tests and/or computer simulation. Moreover, when acceptable methods of prediction have demonstrated compliance with the standards, the results of full scale trials would not disqualify a ship.