Canada's air navigation service provider NavCanada and US aviation information company Jeppesen have combined to offer a free online service that displays real-time North Atlantic (NAT) tracks overlaid with high-altitude meteorological data. Weather and track information is obtainable from other sources, but not graphically combined, and NAT tracks vary daily according to where the predicted high-level winds are located to avoid the strongest headwinds and take advantage of the best tailwinds.
Source: Flight International