Published online by Cambridge University Press: 23 November 2009
An experiment is described in which colour-coded information concerning the aspect of target ships was provided in addition to a relative-motion radar display. This was compared to the normal relative-motion display alone, while a third condition used the normal true-motion display alone. The performance of twenty-one experienced seafarers on six exercises was assessed by five expert judges as an index of display effectiveness. The method of evaluation was found useful and practical, while user reports were shown to be inappropriate. No overall difference between the three displays was found; the reasons for this are discussed and the conclusion is drawn that training is required to gain the benefit of colour in a display.