The steel plates in the bow may be well over one inch thick [3 cm] ​ — on polar icebreakers even up to two inches thick [5 cm] — ​ and the body of the ship has specific ice - reinforcement ribs in addition to the regular ones.
Tērauda plāksnes kuģa priekšgalā ir vairāk nekā 3 centimetru biezas — polārajiem ledlaužiem to biezums sasniedz pat 5 centimetrus —, un kuģa karkass ir nostiprināts ar papildu brangām.