The Baron, manufactured in 1978, had Continental IO-470s rated at 260 horsepower. Its usable fuel capacity was 136 gallons. Beech estimated that its cruise fuel consumption was “approximately 24.2 gallons per hour.” Cruise means different things to different people, but the pilot had bought 66.5 gallons of fuel after arriving at Bellingham from Boise, Idaho, suggesting that he was getting a block mileage of around 6.2 nm per gallon. At that rate, the 4.7-hour, 750 nm flight from Bellingham to Gustavus, with an allowance for taxi, takeoff and climb, would have used around 120 gallons, unless the pilot, mindful of the trip’s length, had leaned a little more aggressively than usual. In any case, his initial estimate of an hour’s fuel remaining when leaving Gustavus seems barely reasonable. Even assuming a direct flight and a successful instrument approach, he would likely have arrived at Sitka on fumes. By the pilot’s own estimate, the Baron cannot have met the IFR requirement for a 45-minute fuel reserve.