What do the different colored navigation lines represent?
2 Answers
Yellow indicates warnings, red represents congestion, and blue signifies smooth traffic. Navigation lines: Navigation line navigation is a more convenient and practical method compared to bearing lines and distance circle navigation. During navigation, the true motion north-up display mode is used, and navigation lines are set on the display screen. Depending on their function, one or multiple lines can be set to connect. Application of navigation lines: Using navigation lines for navigation is more convenient and practical than using bearing lines and distance circles. During navigation, the true motion north-up display mode is employed, with navigation lines set on the display screen. Depending on their function, one or multiple lines can be established to connect. During navigation, the vessel's course should always remain parallel to the navigation line while maintaining a constant vertical distance d from the guide line, thus avoiding danger zones. When the navigation line's turning point is abeam of the vessel, steering can be initiated to change course. This method can also be used in relative motion display mode. When using relative motion display, it's preferable to select the north-up display mode. In this case, the navigation lines will move while the vessel's position remains fixed on the display, with the navigation method remaining the same as described above.
I've been driving trucks for a long time, and the colored navigation lines are extremely practical. Blue represents highways and expressways, ensuring smooth and efficient travel, saving both time and fuel; green indicates ordinary roads, like small streets and alleys within cities; red usually signals congestion or construction, reminding you to detour; yellow often warns of slow zones or accidents, requiring extra attention while driving. Some systems use purple to mark toll booths or speed cameras, so be mindful of additional costs. From my experience, combining these with voice guidance works even better—for instance, seeing a red line prompts an early lane change to avoid getting stuck in highway traffic. Different navigation systems may have slight variations in details, but the overall logic remains the same, helping drivers easily recognize routes. Once beginners get familiar with it, they can save a lot of time and ensure a safe journey. Veteran drivers rely on this trick to minimize the risk of getting lost. The color changes are based on real-time map updates, and accuracy improves with strong signals.
