Some results of a detailed investigation of the spatial variability of
geoacoustic inhomogeneities of the deep ocean bottom for zones of the
hilly relief are presented. Much attention was paid to regions of bot
tom covered by the manganese nodules. Measurements of the geological p
arameters were carried out with a very high resolution (discreteness e
quals to tens or even units of meters) for ranges of 10 - 15 km. Very
intensive spatial variability of the geological characteristics was fo
und, and variability of the acoustic field reflected from such an inho
mogeneous bottom was calculated.