5. January 2021 | Coach Solutions

During winter, the weather in the North Atlantic can be a challenge for all vessels. Selecting the most optimal route is vital for securing the most cost-efficient voyage. Some of the most powerful storms on earth form in the North Atlantic Ocean during wintertime, spelling danger for crews unfortunate enough to encounter them.

The main reason for the heavy storms and the bad weather in the North Atlantic during the winter season is what is called North Atlantic Oscillation (NAO), which is a climate pattern that has a very strong influence over the North Atlantic. The NAO is a natural form of climate variability, explaining short and long phases in climate caused by natural, large scale features. Other natural patterns of climate variability include the Northern Annular Mode, Pacific Decadal Oscillation, and the Atlantic Multidecadal Oscillation. The NAO forms a ongoing low pressure system, which exists over Greenland and Iceland, with a permanent high-pressure system existing over a group of islands roughly 750 nm west of Portugal, known as the Azores. For most of the year, the high and the low pressures are mild, and their influence on the Atlantic basin climate is minimal. When winter enters, all of this begins to change. Both pressure systems grow much more intense and begin to vary from week to week between the two different states. In one state, the positive NAO, the high-pressure system grows especially high. While the second state, a negative NAO, a low-pressure system grows especially low, creating a large pressure difference between the Azores and Iceland.

Geared container vessel sailing in challenging weather conditions

The influence of the NAO and its phases can be felt across the entire Atlantic Ocean and the surrounding continents. Between the two circulating wind systems, clockwise and counterclockwise circulation patterns are created by the high- and low-pressure systems, there is an area where they come together and form a steady, forward moving wind that channels weather systems from the North America to Europe. In order to understand the NAO, it is important to understand what air pressure means.

Air-pressure is a measure of how much air is pushing down on the surface of the Earth at any given point. Normally, high and low pressure systems form when air mass and temperature differences between the surface of the Earth and the upper atmosphere produce vertical winds (more correctly vertical currents). In a low-pressure system, these vertical winds travel upwards and pull air away from the surface of the Earth, decreasing the air pressure above the ground or sea. In contrast, in a high-pressure system, air is being pushed down. The higher in pressure a high-pressure system gets or the lower in pressure a low-pressure system gets, the more intense and larger the spinning circulation pattern becomes.

It is therefore highly suggested that a vessel Owner or Operator take contact to a routing company before commencement of a sea passage order for the routing company to plan the best possible route and avoid any danger both to the crew, vessel and cargo.

At COACH Solutions the route is planned basis the latest updated weather forecast, weather statistics for the last 10 years, vessels hull shape and the vessels current performance. By using the COACH algorithm, the most optimal route is planned and constantly monitored, avoiding bad weather, keeping the crew and cargo safe and at the same time optimizing basis fuel consumption, the value of time and minimizing the CO2 footprint. The route will be recalculated multiple time a day taking the latest weather information and vessel position into account. This gives the owner or operator always up to date overviews of the estimated bunker consumption on a given voyage and a very accurate ETA for the vessels next port.

Example of weather routing from Voyage Optimization

If you are interested in learning more about COACH weather routing and how we can help you optimizing your fuel costs, please don’t hesitate to contact us at sales@coachsolutions.com for an introduction.


5. October 2021 | Coach Solutions

Meet a COACH – Filip Bojanowski

Here at COACH Solutions, we are very proud of our most valuable and greatest asset – our employees. Without them – no COACH Solutions. In today’s “Meet a COACH” interview we are literally flying green – and flying high! Filip Bojanowski, who is our Head of Software Development gives you some insight on some of […]

29. September 2021 | Coach Solutions

First experiences with high frequency data: what to consider?

In the first article in a series of “position articles” our Head of Performance Management, Christian Råe Holm is looking at high frequency data. What to consider? What are challenges and how to overcome the challenges?   With COACH Solutions’ strong ties to the tramp segments, we have seen that many owners are still only […]

14. September 2021 | Coach Solutions

Meet a COACH – Line Kiaerskou

Here at COACH Solutions, we are very proud of our most valuable and greatest asset – our employees. Without them – no COACH Solutions. In our line of “Meet a COACH” interviews we have this time spoken with Line Kiaerskou from our Sales Team. Line is not only bringing a lot of shipping experience – […]

9. September 2021 | Coach Solutions

Is Performance Benchmarking important?

Prediction of ships’ speed-power relationship at speed intervals below the design speed Setting a correct performance benchmark is crucial for monitoring vessel hull performance efficiently. With more ships slow steaming in order to meet EEXI requirements, accurate benchmarking can become an issue because sea trials and model tests are typically performed in the design speed […]

8. September 2021 | Coach Solutions



18. November 2020 | Coach Solutions

Why is weather routing so important?

The aim of weather routing is to achieve optimum speed in order to perform the voyage as energy efficient as possible reducing bunker consumption while providing the safety of ship, crew and cargo. The IMO has publicly states that utilizing weather routing services reduces fuel consumption by up to 3% and even further with larger […]

1. July 2020 | Coach Solutions

Kongsberg Digital acquires COACH Solutions

Kongsberg Digital has acquired COACH Solutions, a leading supplier of software solutions for vessel performance and monitoring. COACH’s vessel performance monitoring system was developed by Danish shipping company Clipper Group. In 2016 COACH was established as an independent company – COACH Solutions ApS – which has grown rapidly. Its software currently has over 900 licenses […]

18. January 2021 | Coach Solutions

Monitor Cylinder lube oil consumption

Cylinder lube oil consumption is one of the most overlooked consumers in fleet performance management. With saving potentials anywhere between 5-10% and often higher there is great value in monitoring the consumption and taking action. Over-lubrication does not only directly impact your profit and loss it also has a negative technical impact on your equipment. […]

12. September 2019 | Coach Solutions

COACH Solutions releases IMO 2020 module

COACH Solutions releases IMO 2020 module COACH Solutions have, in close cooperation with our dedicated clients, developed a simple overview to help operators manage the increasing demands posed by the 2020 global Sulphur Cap. In short, it gives the operator a constantly updated overview of which fuel types are on board the vessel, in which […]

23. September 2019 | Coach Solutions

COACH Solutions launch updated web portal

COACH Solutions has launched an updated web portal to serve existing and new clients. The updated web portal helps the clients continue being updated on the performance and current status of their vessels. The site offers an even more user-friendly navigation platform as well as increased responsiveness. In addition, the back-end for the market leading […]

Related articles