Ice passport of a river icebreaker: maneuvering ability

The work continues with a number of articles analyzing the experience of operating icebreakers of Project 1191 in ice conditions of inland waterways and coastal marine areas. This publication is devoted to the generalization of data from field observations and tests of ice maneuverability of the vessel. The inertial characteristics, course stability and circulation parameters of the icebreaker in fast and broken ice of various characteristics are given in tabular form, depending on the operating modes of its propulsion and steering complex and auxiliary systems. The conditions, capabilities and technology of performing maneuvers in extreme and exorbitant ice are illustrated graphically. A comparative analysis of the maneuverability performances of the vessel in clear water and in ice conditions was carried out.