1,000 ft above highest obstruction w/in 5 NMs
Min IFR En Route Altitude
1,000 ft (2,000 ft in mountainous terrain) above highest obstruction to flight w/in 5 NMs
1,000 ft (2,000 ft in mountainous terrain) above highest obstruction to flight w/in 22 NMs
May compute several ESAs
500 ft above highest obstruction to flight, or 400 feet + 1 chart contour interval, whichever is higher, w/in 3 NMs
500 ft above highest spot terrain, or 400 feet + 1 chart contour interval, whichever is higher, w/in 3 NMs
NVG LL: When encountering a charted man-made obstacle w/in 3 NMs of centerline...
Must visually identify the obstacle.
If not identified by 3 NMs, climb to 500 feet above obstacle
What do you have to do on LL when temp is 32F/0C or below?
Add temp corrections IAW FIH to IMC and Night minimum enroute altitudes
Min required chart annotation?
- O: Objective area
- N: Navigation info (Course line/data)
- E: ESA
- TIP: Turnpoints and IP
- C2: CHUM data/date, and Chart series/date
Min Doghouse Requirements
- Block Altitude
- Course (Mag)
- NVG Altitude
- Night Altitude
- Min IFR
How far do we have to avoid airfields by on a LL?
1500 ft and 3 NMs
Min Wx for an IR LL?
None. Could be 0/0
Speed restrictions for an IR LL route?
As published in AP1B
Mountainous Terrain is defined where?
- US: 14 CFR 95.11
- OCONUS: 500' Surface Elevation Change Over 1/2 NM