Another concept of “prime time” relates to the time at the Prime Meridian, or Greenwich Mean Time. When the sun is at its highest point exactly above the Prime Meridian, it is 12:00 noon at Greenwich and 7:00 a.m. in Ottawa, a prime time for some early-bird summer geocachers.
A third concept of “prime time” is suggested by the image below.
Finally, a fourth concept of “prime time” occurred to me while recently, and FINALLY successfully, struggling with an ex-egll puzzle cache.
Three of these concepts of "prime time" should prove helpful in finding the bearing in degrees T and the distance in meters of this cache from the posted coordinates. The remaining one is quite irrelevant.
Check here to see if your projection is within 10 m. of the prize - chances are it'll be spot on.