Final answer:
The vertical dimensions of the Canadian Minimum Navigation Performance Specifications (CMNPS) are defined by the required vertical separation between aircraft in Canadian airspace.
Step-by-step explanation:
The vertical separation between aircraft that is necessary in Canadian airspace determines the vertical dimensions of the Canadian Minimum Navigation Performance Specifications (CMNPS). The CMNPS states that during daylight hours, the minimum vertical separation for en route flights is 1,000 feet below 29,000 feet and 2,000 feet above 29,000 feet. The minimum vertical separation for nighttime operations on en route flights is two thousand feet. These guidelines contribute to the effective and safe management of air traffic in Canadian airspace.