Times have changed, and so too, our equipment. In spite of our 30-horsepower diesel and almost a half tank of fuel left, we had many miles to go before fetching Guam. Diana understands and therefore had no problem adhering to my "Rule Of Thirds And Halves." That is: Allocate one third of your fuel, water, or food for the first half of the planned journey. Use the second third for the second half, and leave one-third in the tank for contingencies.