This additional guidance advises operators on the selection of stern tube lubricants, such as non-toxic biodegradable lubricants or water-based systems, and make structural and engineering suggestions.
Additionally, there is guidance on the application of ballast-water treatment, including taking into account operations of ballast-water management systems in low temperatures, for the prevention of transfer of invasive species.
There is also guidance on anti-fouling coating capability in polar ice operations in order to minimize the risk of invasive aquatic species transfers via biofouling.
For full text of Part II B Additional Guidance see below.
As adopted from IMO - Full Polar Code text
POLAR CODE CHAPTERS: EXPLANATION AND SUBMISSIONS