Not really true. Two big engines as their egos all want the fastest boat. This means more fuel, more maintenance and higher costs. More anglers carried means more weight (approx 150kg per angler) that in turn uses more fuel.
I know someone with a dive boat that now restricts dive parties to 8 people, down from 12 to save fuel. He reckons divers with their gear weigh 250kg each.
The fuel barge in Poole Harbour a month ago was charging 90ppl for red diesel. 200l goes nowhere in these big cats.
I reckon a skipper needs £300 per trip as a minimum to just cover the cost of running the boat. When you take into account things like moorings, servicing, insurances, maintaining the boat to standard and depreciation as the boat needs to be paid for somehow.
Mull over this. These cats cost £250,000 or more how many trips do you think they have to do to start making a profit?
I fear we will lose many charter skippers in the not so distant future.