"the nuclear powered submarine Kazan entered Havana harbor [...] Just to the right of the sailors on deck, and on the bow of the boat you can see a pretty good-sized patch of the special sound absorbent material applied to the exterior ripped away and missing. It’s not the only area where the material was missing [...] 100mm thick layer of ‘Anechoic tiles’ is applied to the exterior of practically all modern day submarines. [...] Absorbing emanated sound from within and lessening detection [...]
