The influence of scientific and technological progress on the work and life of man in the world ocean is analysed. The main results of investigations and practical solutions are described in details. The drawbacks in the research of some aspects of the problem are shown and the objects of further investigations are outlined.

Results of test stands and of field studies (on marine ships) have shown, that the use of installations for water preparation (IWP), including mineralizers of the wash out type and ozonizers, makes it possible to get water of stable quality independent of the terms of operations of the installations, and also provides the possibility of conditioning of shore water supply and of carrying out disinfection of the ship water supply system. Comparative analysis of the operation of various kinds of IWP on marine ships testifies to the necessity of development of the new types of IWP, which will promote health preservation of crew members having difficult long independent voyages.

Treatment of multicomponent composition ship waste waters by an aluminum-containing waste is substantiated from the hygienic point of view both in laboratory and field studies. The tested principle of treatment provides deep purification of liquid wastes according to the following indicators; particulate matter--95.3%; BCO5--90.0%; oil products--99.5%; cadmium--70.3%; iron--30.0%; phenol--48.1%; SSAS--37.5%. The effectiveness of coagulation of the combined sewage independent of quantitative ratios of bilgeway and waste waters has been confirmed with the help of regression-correlative analysis, which alongside the use of aluminum oxychlorides at the functioning installations of sewage purification and disinfection testify to the possibility of forming of principally new and effective samples of compact ship water protective equipment.