Low-level navigation technique
Flying below normal cross-country altitude (usually to duck under weather):
- Field of view restricted.
- More attention needed flying the aircraft.
- Less time to positively identify landmarks and checkpoints.
- Detailed chart comparison of each impractical.
Technique changes:
| Topic | Rule |
|---|---|
| Checkpoints | Unique, easily recognizable features |
| Line features | Use railway or road crossing track as checkpoint; follow one if it parallels track toward turning point or destination |
| Landmarks flip | Easy at altitude can vanish low (lake hides behind low hill); radio tower can stand out better against horizon if visibility not too limited |
| Over water | Stay within gliding distance of land |
| Winter | Follow shorelines: cuts risk of losing visual orientation in white-out |
| Position lost | Climb as high as safely possible: extends field of view, best chance to re-identify a landmark |
| Diversion going badly | Re-evaluate; if weather keeps worsening, abandon diversion and make precautionary landing rather than press on |
Stay heads-up:
- Watch for rising terrain.
- Note contour lines, spot heights, obstacles along track.
- Log essentials only; check outside often when writing entries: altitude is critical.
Trap: low-level navigation is not the same technique flown lower: checkpoint choice differs, not only altimeter reading.
References
- TP 1102 (Aeroplane Flight Training Manual), Pilot Navigation, Low Level Navigation