| 摘要 |
The invention is a multi-purpose icebreaker having main propulsion devices in the front part of the vessel and steering device in the aft part of the vessel. This kind of icebreaking vessel has excellent steering characteristics and it can efficiently and constantly push the ice field. The main propulsion devices at the bow are azimuth propulsion devices or conventional shaft propulsion devices. The steering devices are tunnel thrusters or smaller azimuth thrusters.
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