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Ground-level — no building footprint at the coordinate
Cross-source consensus
Corroborated — terrain and structure agree (2/2 sources)
Cross-checked against independent public data — USGS 3DEP terrain, Overture/OSM building footprints, the federal hospital registry, and measured dimensions. The State of the U.S. Heliport Record →
eVTOL readiness
UNVERIFIEDConversion feasibility · four readings, one line each
Obstruction screen
No data
No FAA obstacle data on file for this state. Clearance unverified.
Geometry
Meets the FATO footprint
Recorded pad side 125 ft against a 100 ft eVTOL FATO.
Structural FATO
Unverified
The full 100 × 100 ft FATO must be load-bearing. The FAA does not record structural capacity, so no record can confirm it.
Overall
Unverified
No obstruction data on file. The dimensional gap applies; clearance is unverified.
This pad already covers the eVTOL landing footprint as it stands.
recorded pad eVTOL FATO
Recorded pad (limiting side)
125 ft
eVTOL FATO required
100 ft
FAA EB-105 vertiport pattern — 2× a ~50 ft eVTOL controlling dimension, plus a 125 ft safety-area side.
Load-bearing FATO
100 × 100 ft must be structural
No heliport precedent — typically the binding gate for rooftop and hospital pads.
Measured against FAA pad geometry and federal FATO sizing (EB-105). The obstruction screen is the only reading the engine verdict rests on; geometry and structural capacity are stated separately and never folded into it. A dimensional pre-screen — site-level validation required, and independent of the underwriting risk score.
FAA compliance
Q1 · FAA registrationPASS
Active FAA NASR 5010 record.
Q2 · Airspace determinationUNKNOWN
FAA OE/AAA airspace determination data integration pending.
Q3 · State enforcementUNKNOWN
State enforcement posture not yet assessed.
Q4 · NFPA 418UNKNOWN
NFPA 418 adoption status not yet assessed for this jurisdiction.
FAA facility data
FAA LID
HI58
AIX ID
aix:hp:NTB4J99N
Lat / Lng
21.70389, -157.99537
Elevation
13 ft MSL
Pad dimensions
125 × 125 ft
Surface type
ASPH
Activation date
1987/01
Last inspection
2004/08/06
Last owner update
2025/08/25
FAA OEAAA airspace determinations0
No FAA OEAAA determinations linked to this facility.
Blueprint
The record vs. what we measured
96/100
DATA INTEGRITY
eVTOL footprint
Footprint assessment available.
SIGNALFEDERAL RECORDMEASURED
Surface elevation13 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions125 ft side (filed)125 ft side · measured
Obstructions, exact FATO geometry, surface condition, and downwash exposure require a physical Ground Truth capture — not shown above as measured. A field verification completes the record and writes the measured truth to this facility’s authority.
This page is the public data-integrity record. The full RiskIndex assessment — Q1–Q5 compliance, dimensional / FATO analysis, an underwriting-grade risk score, peer benchmark, and a sealed Site Intelligence Report — is available on request.
THE RITZ-CARLTON OAHU-TURTLE BAY, KAHUKU, HI (FAA HI58). AirIndex facility record aix:hp:NTB4J99N. Verifiable at https://www.airindex.io/verify/aix:hp:NTB4J99N.