TY JOUR TI ENSURING SAFETY OF NAVIGATION TAKING INTO ACCOUNT ADDITIONAL SOURCES OF NAVIGATION DATA AND ULTIMATE AWARENESS OF NAVIGATOR KW navigation KW navigation information KW safety of navigation KW automatic identifi- cation system JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Kartashov, S.. AU Menshikov, V.. PY 2015 IS 2015 PB Astrakhan State Technical University