They must be capable of turning quickly to avoid pack ice formations, and the full power must be available for astern movements.
Kufuneka zikwazi ukujika ngkukhawuleza ukunqanda umkhenkce ungapakishani ndawonye, amandla apheleleyo funeka abekho ukwenzela kungabikho zintshukumo zakubuya mva kwenqanawa.