Method for determining field of LNG ship navigation safety

The invention discloses a method for determining the navigation safety field of an LNG ship. The method comprises the steps of firstly, analyzing navigation characteristics and navigation risks of theLNG ship; extracting main influence factors in the field of LNG ship navigation safety; and finally, constructing an LNG ship navigation safety field range calculation model. Quantitative research onthe range of the LNG ship navigation safety field is achieved, and a new thought and a new method are provided for research on the LNG ship navigation safety field; the model comprehensively considers the influence of the factors of the LNG ship and the navigation environment conditions, has good adaptability, and can provide technical support for the safety supervision of the port competent department on the entry and exit of the LNG ship into and from a port; the navigation safety of the LNG ship in a port water area can be guaranteed, the navigation order of a navigation channel is maintained, and reference and tec