Form 26 0427e 2026

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The document is an Aeronautical Assessment Form for Obstacle Evaluation by Transport Canada, designed to assess the need for marking and lighting of structures that may pose hazards to aviation. It includes sections for applicant information, proposal description, geographic coordinates, and compliance with Airport Zoning Regulations. The form must be submitted at least 90 days prior to construction or alterations that affect structure height and requires detailed information about the proposed structure and its surroundings.

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Click ‘Get Form’ to open it in the editor.
Begin with Section 1 by entering the Owner's Name, Contact Person, Address, City, Province, Telephone number, Postal Code, Fax number, and Email Address.
Proceed to Section 2 to fill in the Applicant's Name and similar contact details as in Section 1.
In Section 3, provide a detailed description of your proposal. Ensure you include mandatory information about the type of structure and any relevant specifications.
Complete Sections 4 through 10 by providing information on the nearest community and aerodrome, construction dates, and geographic coordinates as required.
In Section 12, select the appropriate marking and lighting options based on Standard 621 requirements.
Finally, review all sections for accuracy before signing and dating at the end of the form.

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Versions	Form popularity	Fillable & printable
2018	4.8 Satisfied (49 Votes)
2017	4.3 Satisfied (99 Votes)
2014	4.6 Satisfied (37 Votes)

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What are the basic principles of air navigation?

The primary instrument of navigation is the magnetic compass. The needle or card aligns itself to magnetic north, which does not coincide with true north, so the pilot must also allow for this, called the magnetic variation (or declination). The variation that applies locally is also shown on the flight map.

What is an obstacle in aviation?

Obstacles to aviation are installations such as buildings, antennas, towers, cranes, cable cars, wind turbines, high-voltage power lines, cranes and construction machinery, etc., but also plants (especially trees) that may pose a hazard to aviation because of their location or height.

What are the four types of air navigation?

In aviation, there are many different forms of navigating. The most popular are pilotage, dead reckoning, radio navigation (i.e. VORs) or astronomical navigation (i.e. GPS). Dead reckoning is the form of navigation that occupies the majority of our time. Ironically, it is also the least accurate.

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What are the obstacles to air navigation?

The most common obstacles include: broadcast towers. buildings. catenaries (cable crossings) bridges. cooling towers, and. chimneys.

What are aerodrome obstacle limitation surfaces?

Aerodrome obstacles An aerodrome obstacle is one that is located on an area intended for the surface movement of aircraft or that extends above a defined surface intended to protect aircraft in flight. Obstacle limitation surfaces can extend to distances greater than 15 kilometres from the runway thresholds.

What height are aircraft warning lights required in Canada?

Structures exceeding 45 meters (148 feet) must have aircraft warning lights in Canada. Near airports, even shorter structures may require lighting. Red Obstruction Lights Steady or flashing, used for nighttime visibility.

Form 26 0427e 2026

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