The term “AT/B” has become part of many conversations regarding marine transportation systems. This is true not only here in the United States, but increasingly, overseas as well. In fact, there are now more AT/B’s outside the United States, than there are within its’ borders. So what was once thought of as an American transport mode, is in fact far more widespread and the numbers are increasing worldwide. In recent months, perhaps as an indication of the inroads the concept has made in the trades where ships dominate, there has been a great deal of public negativity regarding the capabilities of AT/B’s, to the point where even some class Society representatives have publically stated that AT/B’s are not suited for certain cargoes, and articles have appeared in respected maritime magazines that are critical of the concept. As a designer, the Author sees such criticism as a compliment – an indication that the concept is now recognized as a system to be considered, and to be competed-with. Such positions are to be considered and answered – not cast aside. This paper will be a primer on the AT/B and help to educate business and technical leaders as to the reality of the AT/B vs the contrary
positions taken about the concept. It is a practical discussion based on real experience and will show that while the AT/B is a fine, engineered and safe marine transport system, it is applicable in some cases, and not applicable in others.