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VDP on Approach Plates: The IFR Pilot’s “Go/No-Go” Visual Cue You Should Actually Use

Every instrument pilot has had this moment: you break out a little high, a little fast, runway in sight… and you feel that quiet pressure to “make it work.” That’s exactly why the VDP—Visual Descent Point—exists. It’s not just chart trivia. It’s a practical decision tool that helps you avoid the classic IFR-to-VFR trap: forcing a descent below MDA with no stable path.


If you fly non precision approaches (even “non precision-style” RNAVs), understanding the VDP will make your approaches more stable, more predictable, and—honestly—less stressful.



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What a VDP is (and what it’s for)

A VDP is a charted point on a non precision approach from which you can make a normal descent from the MDA to the runway’s touchdown zone using a typical glidepath (about 3°).


In pilot-speak:

  • At or before the VDP, if you have the runway environment in sight and you can descend normally, you can leave the MDA and fly a stable descent to landing.

  • After the VDP, descending from MDA to the runway usually requires a steeper-than-normal descent—or a dive-and-drive feel—especially if you’ve stayed level at MDA. That’s a big red flag for stability.


VDP exists to answer one question cleanly:

  • “If I don’t see what I need by here, can I still land normally… or should I go missed?”


Where the VDP appears on an approach plate

On a traditional non precision approach chart (think LOC, VOR, NDB, some LNAV minima), the VDP is often shown as:

  • A “VDP” label with a distance, usually DME from the reference navaid or fix (e.g., “VDP 1.2 DME”).

  • Sometimes it’s depicted along the final approach course with other fixes.

  • It may be associated with runway threshold crossing references and timing data.


Not every approach has a published VDP. If it’s not there, you can still use the concept (more on that in a bit).


VDP vs. the MAP (Missed Approach Point)

These two points get confused a lot because they’re both “distance-ish things on final,” but they serve different purposes:


MAP (Missed Approach Point)

  • The point where you must initiate a missed approach if required visual references aren’t in sight.

  • Determined by a fix, DME, timing, or waypoint.


VDP (Visual Descent Point)

  • A planning aid to start a normal descent from MDA to the runway.

  • It’s about stability, not legality.

  • You can legally continue to the MAP at MDA if you’re hoping to see the runway—but VDP tells you whether a stable landing is still realistic.


A good way to remember it:

  • MAP = “Can I continue legally?”

  • VDP = “Can I continue safely and normally?”


Why VDP matters in real IFR flying

1) It prevents the “late dive” to the runway

Non precision approaches tempt pilots into leveling at MDA and then pushing down once the runway appears—often well inside the VDP. That leads to:

  • High descent rates

  • Unstable airspeed

  • Rushed configuration

  • Floating/long landings

  • Runway overruns (especially on short/contaminated runways)


VDP puts a clear line in the sand: normal descent or no deal.


2) It improves your decision making in marginal conditions

If you break out and you’re still in rain, haze, blowing snow, or partial fog, the runway might be visible but not usable (can’t identify touchdown zone, can’t judge sink rate, can’t see alignment). VDP helps you stop bargaining with yourself.


3) It supports stabilized approach criteria

Many operators and training programs emphasize being stabilized by:

  • 1,000' AGL in IMC (or 500' AGL in VMC)

  • On speed, on path, configured


VDP is the non precision approach’s built-in “stabilized approach helper.”


The “right” way to fly a non precision approach using VDP

A simple, pilot-friendly flow:

  1. Brief the VDP distance (and how you’ll identify it: DME, GPS distance, fix).

  2. Plan to be fully configured by MDA or shortly after leveling (gear/approach flaps/power set).

  3. At VDP:

    • If runway environment is in sight and you can descend at a normal rate to a normal touchdown point: begin descent.

    • If not: strongly consider going missed.


That “strongly consider” part matters: VDP isn’t legally mandatory. But it’s an excellent safety trigger.


What counts as a “normal” descent?

In everyday GA flying, “normal” usually means something like:

  • A ~3° path

  • A descent rate roughly 5 × groundspeed (e.g., 90 knots GS ≈ 450 fpm; 120 knots GS ≈ 600 fpm)


If you’re at MDA and the runway shows up after the VDP, ask yourself honestly:

  • Will this require a steep descent?

  • Am I going to land long?

  • Am I behind the airplane?


If yes, the safest move is often boring and professional: go missed.


Approaches without a published VDP: you can still use the concept

If there’s no VDP on the chart, you can create your own “VDP-like” decision point by estimating where a 3° path from MDA would intercept.


A rough technique IFR pilots use:

  • Compute the altitude you need to lose from MDA to touchdown zone elevation (TDZE).

  • Use the 3° rule of thumb: ~300 feet per NM.

  • Distance (NM) ≈ (MDA – TDZE) / 300


Example conceptually:

  • If you’re 900 feet above TDZE at MDA,

  • 900 / 300 = 3 NM

  • So about 3 NM from touchdown is a “normal descent point.”


Most GPS/FMS setups can display distance to runway threshold, which makes this easier than it sounds.


VDP and RNAV approaches: why it still matters

Even with RNAV (GPS) approaches:

  • LNAV minima often behave like non precision: level at MDA until visual.

  • LP can also be non precision-like.

  • LPV and LNAV/VNAV provide a glidepath, so the “VDP problem” is mostly solved—but you still need stabilized criteria and proper visual references before descending below DA/MDA.


When you’re flying LNAV and it feels like “dive-and-drive,” VDP thinking brings you back to stable, repeatable flying.


Common VDP mistakes

Mistake #1: Treating VDP like the MAP

It’s not where you must go missed, but it’s often where you should go missed if a normal landing isn’t developing.


Mistake #2: Descending below MDA before the VDP without adequate references

Even if you see something, you still need the required visual references and the ability to make a safe landing. The VDP doesn’t “authorize” anything.


Mistake #3: Using VDP as a “target” even when you’re already on a stabilized descent

If you’re flying a constant descent final approach (CDFA) technique and staying on a stable pseudo-glidepath, you may cross the VDP already descending. That’s fine—VDP is still a useful checkpoint: “Does this picture look landable?”


The pilot takeaway

The VDP is one of the most practical “little” details on an approach plate. It’s basically the chart saying:

  • “Here’s where a normal descent begins. If you’re still level at MDA after this, the odds of a stable landing go down fast.”


Use it like a professional:

  • brief it,

  • identify it,

  • and let it protect you from the temptation to force an approach to a landing.



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