The tailshaft sealing arrangement found a little lube oil leaky and caused a lot of seawater into the bearing, the step should be taken as a makeshift is（）
- Adropping lube oil for lubrication, reducing the pollution to the sea
- Bsetting a temporary gravity oil tank and enhanced the position properly
- Clubricating with the used lube oil
- Dlubricating with the fresh water and navigation in a lower speed