Fuel consumption and emission levels can then be measured (for urban driving, say, or cruising at a particular speed) and the engine's tuning adjusted accordingly.

ECONOMIST: Car design

This is a remarkable saving, and although she is a small, specialist vessel, many of her features, particularly the new bow and the more efficient system of propellers, could help reduce fuel consumption and emission levels in larger ships as well.

ECONOMIST: Marine technology: A voyage of discovery | The