According to IMO forecasts, CO2 emissions from world shipping could double by the year 2050. Although shipping is in most cases the most efficient mode of transport per unit of transport supply, it is still heavily reliant on heavy fuel oil to power its propulsion. The IMO has introduced regulations to bring about reductions in the emissions of ships, including an Energy Efficiency Design Index...

This paper presents an exact algorithm for the Lock Scheduling Problem (LSP) based on a Combinatorial Benders decomposition. LSP consists of three strongly interconnected sub problems: scheduling the lockages, assigning ships to chambers, and positioning the ships inside the chambers. These three sub problems are interpreted resp. as a scheduling, an assignment, and a packing problem. By combin...

The scheduling method of shiplock has a strong influence on the improvement of shiplock capacity. On the condition that the number of the ships waiting for the lock was relatively stable, the paper constructed an optimization model for joint scheduling of double line shiplock based on the nonlinear goal programming. The hard constraints included that the number of ships arranged in the shiplock...

In 1601, the British ship captain James Lancaster tested what was then a little known innovation in naval dietary practice when he set sail for India with a fleet of four ships. While the crew of three of his ships followed their usual diets, all of the men on the fourth were required to consume a teaspoon of lemon juice three times a day. The utility of this innovation was irrefutable. By half...

Modeling and simulation (M&S) technologies play an ever-increasing role in supporting military applications: simulation-based war gaming, training, operational concept formulation, military utility analysis, and demonstration. The problem with developing specialized, medium-to-high fidelity simulations of military platforms, sensors, payloads, weapons, and CISR is both complexity and cost. Cost...

A model of oil tanker casualties is presented which permits an e.upected casualty ratefor each tanker to be calculated based on its age and casualty history. These expected rates are shown co be good predictors of both the actual cosuoly expertence and the probability of total loss. The model is based on thefindings that 1) the casualty behavior of an individual tankerfollows a Poisson distrtbu...

Problem Statement The U.S. Navy and Joint Tactical Forces require high linearity, state of the art digital communications systems for ships, submarines, aircraft, space and terrestrial sites. It is the intention of the Fleet to transition all existing communications systems from the existing analog to digital technology within the next ten years. In order to efficiently implement this transitio...

Introduction The renewed interest in gas, which started in the 1990s due to its excellent environmental credentials, has seen an increase in the order book for LNG carriers – LNG carriers being the leviathans of the gas carrier fleet. Yet, while attracting great interest, the gas trade still employs relatively few ships in comparison to oil tankers, and hence its inner workings are little known...

We consider a short-term scheduling problem for a shipping company engaged in the product and chemical tanker market. The company operates in a dynamic tramp market, which means that it has a given amount of contract cargoes that it has committed itself to carry. In addition the company has to consider optional spot cargoes to utilize its fleet optimally. A commercial decision support system fo...