Final answer:
VFR Obstacle Clearance Requirements for a 705 Airline operating under Canadian Aviation Regulations are not explicitly defined, as these airlines typically fly under IFR with obstacle clearance governed by those rules. VFR rules are more relevant for general aviation, while commercial airlines must adhere to different sets of procedures and regulations.
Step-by-step explanation:
The VFR Obstacle Clearance Requirements for a 705 Airline, which in most contexts is understood to mean an airline operating under Transport Canada's Canadian Aviation Regulations (CARs) Part 705, are not specifically defined in the same way that Visual Flight Rules (VFR) are established for general aviation. For commercial air transport operations, including those of airlines operating under Part 705, most flights are conducted under Instrument Flight Rules (IFR) where obstacle clearance is primarily dictated by instrument procedures and minimum enroute altitudes rather than VFR criteria.
Under VFR, pilots are responsible for maintaining a safe altitude and clearance from obstacles. In controlled airspace, when flying under VFR, Air Traffic Control (ATC) may provide traffic advisories, and in some cases, basic obstacle information. However, it’s the pilot’s responsibility to navigate clear of obstacles, maintaining the minimum clearance requirements laid out by VFR regulations which may vary depending on the flight environment. For example, in Canada, VFR flights away from built-up areas must be conducted at an altitude that ensures at least 500 feet vertical separation from any obstacle if operated at 1,000 feet or more above the highest obstacle within a horizontal distance of less than 2,000 feet from the aircraft.
Typically, VFR obstacle clearances for general aviation are less relevant for scheduled commercial airlines operating larger aircraft, such as those under Part 705, because these operations are subject to strict operational regulations, standard operating procedures (SOPs), and usually adhere to IFR. It is important for pilots and aviation professionals to be familiar with the regulations that pertain specifically to the types of operations they are involved in.