Definition
The Decision Altitude published for an RNAV (GPS) approach flown using both lateral guidance (LNAV) and vertical guidance (VNAV). At this altitude during the final approach, the pilot must either have the required visual references for the runway in sight and continue to land, or execute a missed approach. LNAV/VNAV minimums are higher than LPV minimums but lower than LNAV-only (non-precision) minimums, and they require approach-approved equipment capable of providing vertical guidance, such as WAAS or a baro-VNAV system.
Plain English
The lowest altitude you're allowed to descend to on this type of GPS approach with vertical guidance. When you reach it, you either see the runway and land, or you go around.
Context Anchor
Seen in the minimums section of an RNAV (GPS) approach chart, such as the LNAV/VNAV line for a specific runway.
Derivation
"Decision" because this is the altitude where the decision to land or go around must be made. "LNAV/VNAV" identifies the type of guidance being used: lateral (side-to-side course) and vertical (glidepath). The pairing tells you both that vertical guidance is in use and which line of minimums applies.
Why Pilots Care
It gives a precise, charted altitude that guarantees obstacle clearance while vertical guidance is available, so the pilot knows exactly when to commit or go missed.
Grounding Statement
On final approach, when the altimeter reaches the LNAV/VNAV DA, the pilot must make the decision to continue visually or execute the missed approach.
Intuition Check
Do not treat LNAV/VNAV DA like an LNAV MDA. A DA is a decision point on a guided descent; it is not an altitude to level off and continue flying along.
Example Sentence 1
With WAAS-approved vertical guidance active, we briefed the LNAV/VNAV DA of 580 feet for the RNAV 14 approach.
Example Sentence 2
At the LNAV/VNAV DA with no visual contact, the crew executed the published missed approach procedure.