An Evaluation of Flashtube Signal Characteristics
COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT
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The United States Cost Guard has long been interested in using flashtubes as an aid-to-navigation. They are highly conspicuous and are energy efficient. In the single flick operation mode, mariners report difficulty in fixing the time less than 10 milliseconds. This factorial experiment investigated the effect on observer performance as each of three factors was varied 1 Flash Repetition Rate 2 Flick Frequency and 3 Number of Flicks comprising the multiflick flash. An analysis of variance revealed all three main factors to be significant as well as some interactions. From the model provided, observer performance can be predicted by specifying the three factors. A simplifying parameter is introduced which reduces the performance model to two factors. Recommendations are made for each of these factors.