North Country Heli FlightHELICOPTER GROUND SCHOOL · ACS-ALIGNED
Commercial (CPL-H) · Lesson 19
ACS Alignment
FAA-S-ACS-16 — Commercial Pilot, Rotorcraft–Helicopter · Area of Operation VII. Navigation · Task: A–D — Pilotage/Dead Reckoning, Navigation Systems, Diversion & Lost Procedures
CH.VII.A.S1 — navigate by pilotage & dead reckoningCH.VII.B.K1 — navigation systems & radar servicesCH.VII.C.S1 — plan & fly a diversionCH.VII.D.R1 — lost procedures & the 5 C’s
⚑ FLAG (Walter): combines Tasks A–D of Area VII (Navigation) — confirm codes.
Navigation, Diversion & Lost Procedures
Find your way by chart, clock, and box — and recover gracefully when the plan falls apart.
By the end of this lesson you can:
Navigate by pilotage and dead reckoning using chart, heading, time, and groundspeed.
Use navigation systems (VOR/GPS) and available radar/flight-following services.
Plan and fly a diversion to an alternate, estimating heading, time, and fuel.
Apply lost procedures (the 5 C’s) to re-establish position and get help.
1 · Pilotage, DR & systems
Pilotage uses visual checkpoints; dead reckoning uses known heading, airspeed, wind, and time. Cross-check both against your GPS and any VOR/radar services — but do not let the magenta line switch off your eyes. Helicopters often fly low where checkpoints look different; keep the chart oriented and your position updated.
2 · Diversion
When you need to divert, estimate the new heading to the alternate (a quick eyeball off the chart), the time and fuel required, and any airspace or terrain in the way. Turn toward the alternate promptly, then refine the calculation — flying roughly the right way immediately beats computing the perfect course while heading off-track.
3 · Lost procedures — the 5 C’s
Step
Action
Climb
For better visibility, radio/nav reception, and terrain clearance.
Communicate
Call ATC/Flight Service for help (121.5 if needed).
Confess
Tell them you are unsure of position.
Comply
Follow ATC instructions/vectors.
Conserve
Manage fuel; plan a precautionary landing while you still have options.
4 · Watch
Curated reference clip — “Pilotage and Dead Reckoning” · SkyEagle Aviation Academy (YouTube), verified via oEmbed. Embedded with the creator’s player; we don’t host or alter it.
Your aircraft: navigation equipment fit (VOR/GPS) is installation-specific — note your R44’s installed nav equipment and how to use it.
✍️ Fill in for the aircraft you flyyour R44’s installed navigation equipment (GPS/VOR) and your fuel reserve/endurance for diversion planning — look these up in the POH/avionics supplement and confirm with your CFI.
⚑ FLAG (Walter): the R44 is a VFR-certificated piston helicopter; confirm the aircraft/figures the student actually flies and that all numbers come from the current R44 POH.
Risk management (the “Consider”): the navigation trap is fixating on the GPS until it fails or misleads, then being truly lost with low fuel. Cross-check chart/clock against the box, use flight following, divert early with a rough-but-prompt turn, and if disoriented, run the 5 C’s and land precautionarily while you still have fuel and daylight.