HowTo/Use Trig Stations
From TrainzOnline
Trig Stations (found in the Objects Menu) can be placed anywhere on your Route to identify the exact lat/long and altitude of location.
Zoom in close to a Trig Station and rotate to see the digital readout of lat and long.
Use the ‘?’ icon to name the Trig Station using the format “xx xxx.xxx N/S xxx xx.xxx W/E” and then use Ctrl F to bring up a list of all named objects.
Click on the lat/long you are looking for from the list and you effectively have an unlimited number of bookmarks.