you obviuously have strong opinions about the charter business even though you clearly know very little about how charter yachts are operated. it's not like the car rental business, and on the crew side it's not like restaurant waiters... we charge the guests using the hour meters for the generators and the ecu fuel meters for the mains, price is based on the actual prices charged by the fuel dock we will refuel at after the charter, I call them on the last day to confirm price. Pretty transparent process to ensure the guests don't feel taken advantage of. as to the crew/tip, it's very different from restaurants and other jobs. On charters, we give 110% no matter what and it's not in hope of a better tip at the end. We have cases where the charterer prepays a 15 to 20% gratuity to the broker and that doens't change our service level. they get the best, no matter what as the incentive isn't a better tip but making sure they give good feedback to the brokers and become repeat guests or refer friends. once in a while, there will be guests who undertip, that's part of the business whatever the reason but we know that it's not because they were not happy with the service they received.