A tale of two sea charts

A tanker had changed from hard copy sea charts to electronic sea charts and it was a Flag State requirement that the second officer had an ECDIS Certificate. Unfortunately the ship manager overlooked this requirement and the second officer assigned by the ship manager did not have this Certificate. A subsequent routine vetting inspection by one of the oil majors revealed the mistake and the oil major informed the ship manager that the ship had been put on technical hold. A technical hold can only be lifted after a new oil major vetting, which can take up to six months. In the meantime the trading flexibility of the tanker had been reduced and the earnings had reduced similarly.The owners claimed the difference in earnings from the manager.