4th Millennium 80HT "Mystere" Launched By Otam The latest hull in the Millennium 80HT line has been launched by Otam. She is grey and white and showcases the name "Mystere" from her transom. The Millennium 80 line is a performance segment with the 80HT expected to give great offshore power. Thanks to a pair of powerful MTU 16V 2000 M94s onboard she can run to a top-speed just shy of the 50-knot range. These diesel engines are connected to dual Arneson surface drives.