One of the more important metrics would be the ship's displacement, determining its weight. The SS United States had a displacement 53,330 tons compared to the "unsinkable" ship's 46,328 tons.

PETROPAVLOVSK-KAMCHATSKY, November 10. /TASS/. The Anatoly Krashennikov ship might have sunk because of cargo displacement in the unfavorable weather conditions, deputy chairman of the Far Eastern ...