Trail

TZ iBoat can keep track of your Own Ship position history using Trail. The trail is always and automatically recorded in the background (you have nothing to enable) and it can be either displayed or hidden on top of the chart.

To display the trail on your chart, click on the boat icon and enable "Own Ship Trail". You can also show or hide the trail using the “Layer” menu (found under the “Other Layers” section).

When enabled, the trail displays behind the boat icon all your contiguous position using animated white and black dots:

The trail duration can be adjusted from the Ship & Trail settings. Note that the trail display is dynamic and changing its duration will immediately update its length on the chart. By default, TZ iBoat displays a trail duration of 1 day, but you can make it as short as 30 minutes or as long as 20 days.

Note: the trail recording frequency is fixed to once per second (for maximum accuracy). However, the accuracy of the trail that is displayed on screen will vary automatically with the trail duration (length). When the trail duration is set to 1 day (or shorter), the display accuracy matches the recording accuracy (once per second). When the trail duration is in between 1 and 2 days, the display accuracy is 3 sec. When the trail duration is in between 2 and 5 days, the display accuracy is 6 sec. When the trail duration is in between 5 and 20 days, the display accuracy is 14 sec. When the trail duration is set to 20 days (maximum value), the display accuracy is 60 sec.

The trail thickness can be adjusted from the Ship & Trail settings to make it as bold or as thin as you want.

TIP: The trail is extremely useful when you need to know where you have been quickly, and to track back to your original location for short trips. The trail duration can be adjusted to fit your specific navigation style and will prevent to clutter the screen. However, if you want to permanently record specific trips, TZ offers another functionality called "Trips". Make sure to read the following chapter to learn more about "Trips" in TZ iBoat.