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Power Routing Overview, Set Up and Use
Power Routing Overview, Set Up and Use

Fuel Optimised Routing using Wind, Waves and Currents for Power Vessels

Nick Olson avatar
Written by Nick Olson
Updated in the last hour

Power Routing is a weather routing and departure planning feature specifically designed for Power Vessels and Ships available through the PredictWind Forecast website https://forecast.predictwind.com/ , the PredictWind App and Offshore App.

The Power Routing is a Standard or Professional level forecast subscription feature.

To review your subscription and upgrade if required, please click here: https://forecast.predictwind.com/register/change/package

What is Power Routing?

Power Routing provides a recommended route between waypoints from your set start time for each available weather forecast model based on your Power Vessels dimensions/performance characteristics and your routing preferences.

The Power Routing algorithm performs billions of calculations to find the most fuel-efficient or comfortable route for your boat to motor a given route. The algorithm considers the boat's drag due to windage and the drag due to wave conditions. The routing uses the world's most comprehensive ocean current and tidal currents to find the optimal route. With a Professional forecast subscription you will also be able view the Roll, Vertical Acceleration and Slamming Incidence your boat will likely experience through the route.

How to set up Power Routing using the Forecast Website

Setting up the Power Routing can be done on the PredictWind Forecast Website at https://forecast.predictwind.com/atlas/powerRouter/# once set up, all the PredictWind Apps will use these settings saved in your account.

Power Routing feature walkthrough video

To set up Power Routing using the forecast website:

  • Click on the Weather Routing menu, then the Power Routing sub-menu.

  • On the top menu, click on Routing Preferences.

  • Type in the following parameters for your vessel:

    • Height (waterline to top of wheelhouse, meters)

    • Economic boat speed (knots).

    • Economic RPM.

    • Economic fuel consumption (Litres/hour).

Power Boat Dimensions

  • Next, select your Boat Dimensions from the drop-down box and type in your:

    • Displacement (metric tons).

    • Waterline Length (meters).

    • Beam (meters).

    • Draught (meters).

The router will use these supplied dimensions to alter the performance of your boat based on the influence of wind and wave conditions.

Power Route Defaults, Tidal & Ocean Currents

Next, set the Depth Avoidance; this will use a depth contour to avoid water shallower than the depth you specify. This is an important setting. If you find a route can't be calculated, or an odd route is suggested, please check this setting is accurate for your boat or try adjusting it to a lower setting. We recommend using the lowest setting that is safe for your boat.

Select the Ocean Currents Model you wish to use in the route.

Power Route Optimization Selection

Next, at the top of the page, you can choose to optimise for Fuel Efficiency or Comfort.

If you select Comfort, you must specify the additional conditions you wish the router to avoid. The route will still try to optimise for fuel efficiency but will avoid the specified conditions.

These are also critical settings. If you find a route can't be calculated, or an odd route is suggested, please adjust these settings upwards to increase the range of conditions available for the optimized route to follow. We recommend using the defaults or higher settings if you're comfortable with those.

Calculate a Power Route

Now your boat parameters, dimensions and routing preferences are configured, select the Power Routing tab. Drag and drop the green Start Waypoint and the red Finish Waypoint to your desired locations.

Power Routing Options

You may also position these using GPS coordinates by clicking Edit on the waypoint icon to reveal the Latitude/Longitude of our start & finish positions for editing. You can also add port and starboard rounding waypoints if desired. Please make sure all your waypoints are well in the water.

Exclusion Boundaries

To add an exclusion Boundary:

  • Click on the Waypoints icon.

  • Click on exclusion Boundaries, then Create Boundary.

  • Click on the map where you want to add a boundary and add sufficient points to make it a closed shape. Once you have the points on the map, you can move each point and add a lat/long if you wish to be specific.

  • To delete the boundary, click on the centre and delete.

Run a Power Route

You can now calculate your powerboat route; click the Download button. Your route will be calculated using your Powerboat parameters and show six routes related to the six weather models, wave and currents.

When you click on the weather model from the bottom right, you will see a control panel pop out; you can change the display here.

Forecast Options

  • ECMWF is Black

  • UKMO is Yellow

  • Spire is Orange

  • PWG is blue

  • PWE is Red

  • GFS is Green

Display Controls

These include map display types:

  • Streamlines

  • Wind barbs with colour contours

  • Wind arrows with colour contours

Display Parameters

Parameter selections which you can select here include:

  • Wind

  • Currents

  • Rain

  • Cloud

  • Air temperature

  • Gust

  • Cape

  • Wave

The animation play speed is also adjustable in this pop-out.

Route Display & Use

Wind Maps

The displayed wind maps relate to that model and the associated route. For example, selecting the PWE model corresponds to the red track, and the boat is displayed on the active route.

You can turn off one or more of the displayed routes by clicking on toggle routes and clicking on the tick box to turn on or off. Click x to close.

Animate the route

Press the play button or control the display with the time slider ball or the forward and back arrows.

By clicking on any point on a Powerboat route, we get details for that point on the route.

Routing Tables

At the top of the screen, click on Tables. The tables include detailed data about your routes for all models. We have Graphs with many important details along our route, including the Roll, Vertical Acceleration and Boat Slamming.

Tables include Wind, Summary, Route, Wave, Atmosphere And Current.

We also have the Export function, which allows you to export the weather route in several digital formats for Navigation software.

Click on the Map button to go back to the routing Map.

Congratulations! You are now ready to use the PredictWind Power Routing!


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