TY JOUR TI NARROWING OF THE RANGE OF THE CALCULATED VALUES OF THE MAIN DIMENSIONS OF ICEBREAKERS TAKING INTO ACCOUNT THE CONDITIONS FOR OPTIMAL USE OF PROPELLERS KW propeller KW optimization KW ice resistance KW propulsion complex KW icebreaker KW disk ratio JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Temnikova, A.. PY 2016 IS 2016 PB Astrakhan State Technical University