Nav 22 - LLN VNC Chart Prep

Question 1

What is the difference between an obstacle and a hazard on a VNC?

Answer 1

Obstacle: Areas, objects or entities that that legally need to be avoided to maintain safe separation

Hazards: Any areas, objects, entities that will cause an immediate threat to safety under conditions if not avoided.

Question 2

What are some obstacles?

Answer 2

Provincial or national parks
Poultry & fur farms
Sensitive citizens

Question 3

What are some hazards?

Answer 3

All towers above 400 ft
All advisory or restricted areas highlighted in red
All aerodromes (2nm radius) circles in red for critical and green for non-critical

Question 4

What does a hack, turning point, initial point and target symbols look like on a VNC?

Answer 4

Hack: __ . __
Initial point: Square
Turning point: Circle
Target: Triangle

Question 5

Mileage and time marks are included on either side of the track, where is each located and what are their increments?

Answer 5

Right hand side: Time in two minute increments, counting up to target

Left hand side: Mileage in 5 nm increments, counting down to each turning point.

Question 6

How are “Dog Houses” constructed?

Answer 6

Magnetic track on top
Distance on top, rounded to nearest nm
Min IRF safety altitude on bottom

Question 7

When determining the highest obstacle or hazard, what is not included is the consideration?

Answer 7

Obstacles that aren’t causing a collision hazard such as sensitive citizens, parks, aerodromes … ect

Question 8

What is the minimum IFR safety altitude for:

Highest obstacles within 5 nm of aircraft?
Designated Mountainous Areas 2,3,4?
Designated Mountainous Areas 1 and 5?

Answer 8

Highest obstacles within 5 nm of aircraft: 1000’ above
Designated Mountainous Areas 2,3,4: 1500’ above
Designated Mountainous Areas 1 and 5: 2000’ above

Question 9

Review Questions

How do you identify the target on the map?

Answer 9

Triangle

Question 10

Review Questions

How do you identify the hack on the map?

Answer 10

Dash Dot Dash / __ . __

Question 11

Review Questions

How do you identify the minimum IFR safety altitude on a particular sub-leg?

Answer 11

Highest obstacles within 5 nm of aircraft: 1000’ above
Designated Mountainous Areas 2,3,4: 1500’ above
Designated Mountainous Areas 1 and 5: 2000’ above

Question 12

Review Questions

Along a sub-leg, the highest obstacle/ hazard within 5 nm of the track is a spot height of 872’ ASL. This spot height is located within 5 nm of Hecla Provincial Park. What is your minimum IFR safety Altitude on this sub-leg?

Answer 12

872’ rounded up to nearest 100’ = 900’

900’ + 1000’ = 1900’ ASL