SURFACE CURRENT ESTIMATION DEVICE, SURFACE CURRENT ESTIMATION SYSTEM, OCEAN MODEL ESTIMATION DEVICE, AND RISK DETERMINATION DEVICE

摘要

A velocity of a surface current is easily calculated. A surface current estimating device la is provided, which includes a ground velocity calculating module (11) configured to calculate a ground velocity vector of a ship at a target location where the ship is located on the sea, an estimator (12a) configured to receive an input of one or more values of at least one parameter at the target location, and estimate and output, as a log velocity vector of the ship, a value corresponding to one of conditions, the at least one parameter causing an influence on the log velocity vector of the ship, each of the conditions defined by a combination of the received values, and a surface current calculating module (13) configured to calculate the surface current velocity vector of the target location, based on the output value as the log velocity vector estimated by the estimator (12a) and the ground velocity vector calculated by the ground velocity calculating module (11).