00634naa#a2200169#i#450# EN\\bibl\67896 20241126061040.2 2218-130X 20120925b2012####ek#y0engy0150####ca RUS RU THE INFORMATIONAL SUPPORT OF THE NAVIGATION SECURITY AND THE ECOLOGICAL SECURITY IN ZONES OF LIMITED DEPTHS IN THE SYSTEM «RIVER – SEA» BY MATHEMATICAL MODELING Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2012 7 с. Journal article local Molchanov V N journals.igps.ru