Mark captains a ferryboat. This ferryboat carries tourists on roundtrips from Seattle to Victoria and back, each trip of which lasts from 15 to 17 hours and provides for a 6- to 7-hour layover in Victoria. During the layover, Mark typically takes a four-hour nap on a cot that he has stored in the pilothouse of the ferryboat. Is Mark entitled to take a deduction for the cost of meals during the roundtrips from Seattle to Victoria and Back?