Ship's speed can take the following values: * Slow (低速) * Fast (高速) * Fast+ (高速+) * Faster (最速) * Light (光速) Initially, a ship is either slow or fast, the speed can be increased (from slow to fast to fast+ to fastest) using the engine synergy, by equipping a turbine (can be equipped in the expansion slot) and one or more boilers (Enhanced Kanhon Type Boiler and New Model High Temperature High Pressure Boiler) on a ship. The effects are