During World War II, when the icebreaker Tarmo was hit by a bomb, the navigating deck and most of the cabins were destroyed, but the hull did not even spring a leak.
Kui jäälõhkuja „Tarmo ” sai Teise maailmasõja ajal pommitabamuse, hävisid peatekk ja suurem osa kajutitest, keres aga polnud ühtki lekkeauku.