HSC Manannan
| Manannan entering Douglas Harbour | |
| History | |
|---|---|
| Name | 
 | 
| Namesake | Manannán mac Lir | 
| Operator | 
 | 
| Port of registry | Douglas Harbour | 
| Route | |
| Builder | Incat, Hobart, Australia | 
| Yard number | 050 | 
| Launched | 7 November 1998 | 
| Completed | 21 November 1998 | 
| Commissioned | 1998 | 
| Recommissioned | 2009 | 
| Refit | 2001, 2009 | 
| Identification | 
 | 
| Status | In service | 
| General characteristics | |
| Class & type | 96 metre WPC | 
| Type | High speed craft | 
| Tonnage | 5,743 GT | 
| Length | 95.47 m (313 ft 3 in) | 
| Beam | 26.16 m (85 ft 10 in) | 
| Draft | 3.7 m (12 ft 2 in) | 
| Installed power | 4 × Caterpillar diesel engines | 
| Speed | Lightship condition: 50 kn (93 km/h; 58 mph) Fully laden: 40–42 kn (74–78 km/h; 46–48 mph). | 
| Capacity | 
 | 
HSC Manannan is a 96-metre (315 ft) wave-piercing high-speed catamaran car ferry built by Incat, Australia in 1998. After commercial service in Australia and New Zealand, she was chartered to the US military as Joint Venture (HSV-X1). Now owned and operated by the Isle of Man Steam Packet Company, she mainly provides a seasonal service between Douglas Harbour and Port of Liverpool.