A magneto-hydrodynamic drive, or caterpillar, that would enable the sub to run virtually silent. It is possible that this new drive system allowed Captain Ramius...
Viđ teljum ađ ūessi op á bķgi og skut séu fyrir drifkerfi, ūrũstivatnshreyfil, sem gerir honum kleift ađ sigla nær hljķđlaust.