You edit the properties of a vessel using the Vessel Editor:
Change a vessels name by tapping on its current name and editing the text to the new name. You are encouraged to keep the vessel names unique, although this is not required.
You can choose the vessel color here. Note that the vessel color is used as the base color for both its track and any generated weather routes.
Some of the colors have more contrast than others. Choose accordingly.
Vessels may contain a list of position reports. Position reports can be used to keep track of where a vessel has been (its track) as well as record where it is at the moment. Position reports are described in more detail in the Manual Routing section of the user manual.
You can limit the length of a vessels track by specifying how many days of reports you wish to record. As you add position reports to a vessel, if the track exceeds the specified number of days, the oldest reports are removed.
If you want to delete or modify any of a vessels position reports, use the Routes and Boundaries tool, as described in the Manual Routing section.
Manual routing is described in more detail in its own section of the manual.
Briefly, vessels can follow both weather routes and manual routes. It is possible to attach a generated weather route to a vessel using the weather routing tools menu. As you change the GRIB time, you will see the vessel track along the attached weather route.
Once the GRIB time advances beyond the end of the associated attached weather route, or if there is no attached weather route, then the system will project the vessel along the indicated route, according to the average speed that has been set.
Manual routing is one way for you to explore long passages. If a passage is much longer than available weather forecasts, manual routing can be used to let you experiment with possible paths to follow.