Shipowners have already ordered more than twice as many supertankers this year as in all of 2025, a buying spree worth over $20 billion that is the biggest for at least 25 years, as the US-Iran war redraws trade routes and boosts demand for long-haul crude shipments.Data from Signal Group, a shipping analytics platform, show 217 Very Large Crude Carriers ordered so far in 2026, against 93 last year. Allied Shipbroking recorded 164 VLCC orders, up from 83. A VLCC carries about…