Custom-designed and hugely expensive floating hardware of every size and shape is pouring into the upstream oil and gas sector at an unprecedented rate as the industry spreads its operational nets deeper and wider. They don't come any bigger than Pieter Schelte, the multi-role catamaran contractor Allseas is building to take on the toughest platform removal and installation tasks along with such high-end pipelay assignments as may come along from time to time.