Norway's Westcon Yards has appealed a court verdict which awarded $45m to floatel owner Prosafe.
Stavanger city court decided in favour of Prosafe last month in a row over the conversion of a tender support vessel (TSV).
Westcon was ordered to pay Prosafe NOK 344m plus interest and NOK 10.6m in legal costs.
Prosafe said it is "prepared to continue to defend its case in order to maintain or improve on the result in the first instance."
