With its powerful fleet of icebreakers, which includes three nuclear icebreakers, the Soviet Union has constantly been able to extend the navigation period on the Northern Sea Route to the present time of seven months.
Ngamandlakazi ayo amakhulu, amendu abophuli-mkhenkce adibanisa izazulu ezintathu zabaphuli-mkencke, lqumrhu elilawulayo liye ngokuzinzileyo laba nako ukongeza ixesha loqhutyo nqanawa kwindlela yolwandle olusemantla ukuya kwixesha langoku kwiminyaja esixhenxe yonke eqingqiweyo.