Abstract

Abstract The paper presents a multi-objective deterministic method of weather routing for sailing vessels. Depending on a particular purpose of sailboat weather routing, the presented method makes it possible to customize the criteria and constraints so as to fit a particular user’s needs. Apart from a typical shortest time criterion, safety and comfort can also be taken into account. Additionally, the method supports dynamic weather data: in its present version short-term, mid-term and long-term term weather forecasts are used during optimization process. In the paper the multi-objective optimization problem is first defined and analysed. Following this, the proposed method solving this problem is described in detail. The method has been implemented as an online SailAssistance application. Some representative examples solutions are presented, emphasizing the effects of applying different criteria or different values of customized parameters.

Highlights

  • Weather routing methods for sailing vessels has long been developed due to the great regattas such as America’s Cup, Cowes Races, Mug Races and others related events

  • In this paper we present a method finding a route with the shortest journey time as a main objective, while taking into account other aspects important for route planning

  • Additional course alteration costs and penalties, which are added to the sum of weights Since the sense of comfort is relative, the abovementioned discomfort factor is dependant on a userconfigured parameters reflecting the user type and routing’s purpose

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Summary

INTRODUCTION

Weather routing methods for sailing vessels has long been developed due to the great regattas such as America’s Cup, Cowes Races, Mug Races and others related events. In practice applying various turn costs translates to sailing routes consisting of either multiple short tacks or just a few long ones Another new element of hereby presented version of the method is that it supports dynamic weather data: all available weather forecasts are analysed simultaneously by the optimization algorithm. To obtain sailing time from Pk to Pk+1 we assume that the current weather forecast is valid for both points For such weather data, sailing conditions are determined based on the polar diagram presented in. Each edge is associated with a table of travel times, each of them determined depending on a particular weather forecast, which is valid for a specific period

A GRAPH-BASED SOLUTION OF THE PROBLEM
CONCLUSIONS
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