Hi Cameladventures,
firstly, welcome to Subsim.com
Like danlisa mentioned they have been removed intentionaly, I had to get used to it as well at first but because of this it made me use my Navmap even more with drawing lines in the dirrection they are heading to give a idea where I might meet them.
it didnt really effect my tonnage score, but it did made the game a bit more interactive
its a little detail you'll get used to after a while.
HunterICX