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Advanced Operations > Section 3: Human factors Indicate the factor that tends to emphasize the empty field myopia effect in winter.
 The steep terrain that blocks the view in the distance. The sun behind the observer causes the details and the relief of the visual field to be lost. The sun in front of the observer causes the details and the relief of the visual field to be lost. Large wooded areas that block the view in the distance. Bertrand :
Empty field myopia (empty-space myopia):
a condition in which the eyes, having nothing specific within the available visual field upon which to focus, focus automatically at a range of the order of a few metres ahead. Detection of objects outside this restricted field of view is delayed and if an object of interest does enter the restricted field of vision, the determination of its size or range would be problematic.

The list below consists of several identified conditions when the eyes often tend to turn back to their natural resting state:
- in Visual Meteorological Conditions (VMC), when the sky is featureless and visibility is 10 km. or more;
- in very dark night with no stimuli outside to focus on;
- in hazy conditions when the optical properties of the atmosphere alter the appearance of aircraft and terrain;
- in bright light and glare when the flight is conducted in very sunny conditions over a cloud layer or the flight course is in the direction of the sun;
- flying over snow covered or desert surfaces with predominantly featureless ground characteristics and over large bodies of water.
Advanced Operations > Section 2: Airframes, power plants The piezoelectric barometer installed in a drone indicates:
 Flight altitude. Atmospheric pressure. Flight height. Take-off altitude. Bertrand :
The atmospheric pressure at your current altitude “presses” against the piezoelectric sensor, which generates a distinct and reproducible voltage proportional to that pressure. Consequently, by knowing the local pressure, as your drone ascends, the atmospheric pressure will decrease (or increase if you are at the top of a bridge or tower and your drone descends lower), and the barometer can provide you with altitude information relative to your starting point.
Advanced Operations > Section 1: Air law In addition to registration, what other documents are required from the user of a RPAS when performing advanced operations?
 An RPAS Safety Assurance provided by the manufacturer. An airworthiness certificate. A written authorization from NAV CANADA for advanced operations. A manufacturer's maintenance schedule approved by Transport Canada. Bertrand :
Drones used to conduct advanced operations must be declared as able to perform certain advanced operations safely. An RPAS Safety Assurance is needed to conduct advanced operations.
The RPAS Safety Assurance tells users the safety limits of the drone they are using. Pilots must operate their drone within the limits outlined in the RPAS Safety Assurance that its manufacturer declared to Transport Canada.
If you build or modify Remotely Piloted Aircraft Systems (RPAS), or 'drones', you can make a declaration to Transport Canada identifying the capabilities of the system (you must be able to prove that the drone complies with Canadian Aviation Regulations Standard 922 and Canadian Aviation Regulations 901.76 if it is to be used for advanced operations).
Basic Operations > Section 1: Air law 101-Interpretation (definitions).

The abbreviation “sRPA” stands for:
 A small remotely piloted aircraft of less than 25 kg. A small remotely piloted aircraft between 250 g to 25 kg operated with in visual line of sight (VLOS). A small remotely piloted aircraft of less than 250 g. A small remotely piloted aircraft between 250 g to 25 kg Bertrand :
https://www.tc.gc.ca/en/servic..
Advanced Operations > Section 1: Air law 101-Interpretation (definitions). The abbreviation 'sRPA' stands for:
 A small remotely piloted aircraft between 250 g to 25 kg operated with in visual line of sight (VLOS). A small remotely piloted aircraft of less than 250 g. A small remotely piloted aircraft between 250 g to 25 kg A small remotely piloted aircraft of less than 25 kg. Bertrand :
Https://www.tc.gc.ca/en/services/aviation/publications/tp-15395.html
Advanced Operations > Section 2: Airframes, power plants The aneroid capsule allowing the measurement of barometric altitude is airtight and senses:
 Dynamic pressure. Total pressure. Differential pressure. Static pressure. Bertrand :
Static pressure = the pressure surrounding the aircraft at its current altitude.
Basic Operations > Section 2: Airframes, power plants Altimeter.

The piezoelectric barometer installed in a drone indicates:
 Flight height. Atmospheric pressure. Take-off altitude. Flight altitude. Bertrand :
The atmospheric pressure at your current altitude “presses” against the piezoelectric sensor, which generates a distinct and reproducible voltage proportional to that pressure. Consequently, by knowing the local pressure, as your drone ascends, the atmospheric pressure will decrease (or increase if you are at the top of a bridge or tower and your drone descends lower), and the barometer can provide you with altitude information relative to your starting point.
Advanced Operations > Section 2: Airframes, power plants Barometric altitude measurement is obtained from:
 A pressure sensor. Accelerometers. A dynamic pressure capsule. A dynamic pressure probe. Bertrand :
This is an aneroid capsule that measures (barometric) altitude by measuring static pressure (the pressure surrounding the aircraft at its current altitude).


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