when SI displaced them both. Perhaps that's why I still think in ounces ad inches, which haven't changed.
Mike Stevens One of the advantages of the imperial system (especially in the days of bushels, rods etc.) was that most working measurements could be done with small, visualisable numbers - for example boat fittings in inches, boats in feet, and canals in yards, chains, furlongs and miles, reducing the need for calculation. Obviously with more accurate measures and calculators this advantage no longer applies, but I still find it difficult to visualise a boat freeboard in millimetres! Sean
