twelve o’clock
They ` fudge ' , as it is termed , the answer , and if they get it right are quite content without troubling themselves in any way with the principle involved . If you want to be a good navigator you must grasp the principle , and work the answer out for yourself . When you can do this you will have a right to call yourself a navigator . If you come to me at twelve o'clock to-morrow I will show you how to work a quadrant . The theory is easy . You have but to take the angle the sun makes with the horizon at its moment of highest ascension . In practice , however , this is far from easy , and you will be some time before you can hit upon the right moment .