CAS = Change Average Speed, or Continue Average Speed.
Likely the most common instruction in Navex. While usually at a turn or change of road surface, it is the instruction to start driving at a new average speed.
TIME: In Navex Rallying everything is based on time. Make sure to set your watch to the Official Time at the start of the rally. All Checkpoint crews and volunteers will have done the same, and the entire event is run on this principle.
CAR 0= In Performance Rally, Car 0 is a course warning car, that is before rally traffic. It's usually fancy and loud, with lights and very cool blinky things.
In Navex, Car 0 is a mythical car. It does not physically exist. It drives the route perfectly on time, it never gets lost, it is never too slow or fast.
It is a way to calculate the timing for the event. You may ask for Official Car 0 Time at a Checkpoint.
Your start time for the rally, is based on Car 0. Cars depart on 2 minute intervals. This event starts at 16:30. If you are car #1, you will go at 16:32. If you are car 11 you are 22 min after car 0, or 16:52. etc etc.....
Someone will be there to send you on your way. Instructions are given to you 1 minute before your time out.