# NavCkpt

VOR Receiver Checkpoint data providing ground and airborne checkpoints for verifying VOR receiver accuracy

**Source:** NASR table `NAV_CKPT` · version `e25086c3e952` · effective 2026-04-16

> Ordered by NAV_ID, NAV_TYPE, COUNTRY_CODE, CITY, AIR_GND_CODE, BRG. Only VOR, VOR/DME, and VORTAC type NAVAIDs have checkpoints.

## Example query

```graphql
# Introspect the NavCkpt type in GraphiQL at https://api.nav.sortie.co/graphql
# Example shape (pair with a compatible root query field):
{
  # ...rootQuery... {
    effDate
    navId
    navType
    stateCode
  # }
}
```

Run at https://api.nav.sortie.co/graphql (GraphiQL available in-browser).

## Fields

| Field | Type | Description | Units | Enum |
|---|---|---|---|---|
| `effDate` | `String` | The 28 Day NASR Subscription Effective Date in format YYYY/MM/DD |  |  |
| `navId` | `String` | NAVAID Facility Identifier. References NAV_ID in NAV_BASE. |  |  |
| `navType` | `NavCkptNavType` | NAVAID Facility Type. References NAV_TYPE in NAV_BASE. |  | `VOR`=VHF Omni-Directional Range; `VOR/DME`=VHF Omni-Directional Range with DME; `VORTAC`=Combined VOR and TACAN facility |
| `stateCode` | `StateChkCode` | Associated State Post Office Code. References STATE_CODE in NAV_BASE. |  | `AK`, `AL`, `AR`, … (49 values) |
| `city` | `String` | NAVAID Associated City Name. References CITY in NAV_BASE. |  |  |
| `countryCode` | `String` | Country Post Office Code for country where NAVAID is located. References COUNTRY_CODE in NAV_BASE. |  |  |
| `altitude` | `Int` | Altitude of the checkpoint; only populated when checkpoint is an airborne (air) checkpoint | feet MSL |  |
| `brg` | `Int` | Bearing of the VOR checkpoint from the NAVAID | degrees |  |
| `airGndCode` | `AirGndCode` | Air/Ground Code indicating whether the checkpoint is an airborne or ground checkpoint |  | `A`=Air checkpoint; `G`=Ground checkpoint; `G1`=Ground One checkpoint |
| `chkDesc` | `String` | Narrative description associated with the Air or Ground checkpoint location |  |  |
| `arptId` | `String` | Airport Identifier associated with the checkpoint location |  |  |
| `stateChkCode` | `StateChkCode` | State Code in which the associated checkpoint city is located |  | `AK`, `AL`, `AR`, … (49 values) |

## Enum values

### `stateCode` (`StateChkCode`)

| Code | Description |
|---|---|
| `AK` | Alaska |
| `AL` | Alabama |
| `AR` | Arkansas |
| `AS` | American Samoa |
| `AZ` | Arizona |
| `CA` | California |
| `CO` | Colorado |
| `DE` | Delaware |
| `FL` | Florida |
| `GA` | Georgia |
| `GU` | Guam |
| `IA` | Iowa |
| `ID` | Idaho |
| `IL` | Illinois |
| `IN` | Indiana |
| `KS` | Kansas |
| `KY` | Kentucky |
| `LA` | Louisiana |
| `MA` | Massachusetts |
| `MD` | Maryland |
| `ME` | Maine |
| `MI` | Michigan |
| `MN` | Minnesota |
| `MS` | Mississippi |
| `MT` | Montana |
| `NC` | North Carolina |
| `ND` | North Dakota |
| `NE` | Nebraska |
| `NJ` | New Jersey |
| `NM` | New Mexico |
| `NV` | Nevada |
| `NY` | New York |
| `OH` | Ohio |
| `OK` | Oklahoma |
| `OR` | Oregon |
| `PA` | Pennsylvania |
| `PR` | Puerto Rico |
| `QW` | Wake Island |
| `SC` | South Carolina |
| `SD` | South Dakota |
| `TN` | Tennessee |
| `TX` | Texas |
| `UT` | Utah |
| `VA` | Virginia |
| `VI` | Virgin Islands |
| `WA` | Washington |
| `WI` | Wisconsin |
| `WV` | West Virginia |
| `WY` | Wyoming |

### `stateChkCode` (`StateChkCode`)

| Code | Description |
|---|---|
| `AK` | Alaska |
| `AL` | Alabama |
| `AR` | Arkansas |
| `AS` | American Samoa |
| `AZ` | Arizona |
| `CA` | California |
| `CO` | Colorado |
| `DE` | Delaware |
| `FL` | Florida |
| `GA` | Georgia |
| `GU` | Guam |
| `IA` | Iowa |
| `ID` | Idaho |
| `IL` | Illinois |
| `IN` | Indiana |
| `KS` | Kansas |
| `KY` | Kentucky |
| `LA` | Louisiana |
| `MA` | Massachusetts |
| `MD` | Maryland |
| `ME` | Maine |
| `MI` | Michigan |
| `MN` | Minnesota |
| `MS` | Mississippi |
| `MT` | Montana |
| `NC` | North Carolina |
| `ND` | North Dakota |
| `NE` | Nebraska |
| `NJ` | New Jersey |
| `NM` | New Mexico |
| `NV` | Nevada |
| `NY` | New York |
| `OH` | Ohio |
| `OK` | Oklahoma |
| `OR` | Oregon |
| `PA` | Pennsylvania |
| `PR` | Puerto Rico |
| `QW` | Wake Island |
| `SC` | South Carolina |
| `SD` | South Dakota |
| `TN` | Tennessee |
| `TX` | Texas |
| `UT` | Utah |
| `VA` | Virginia |
| `VI` | Virgin Islands |
| `WA` | Washington |
| `WI` | Wisconsin |
| `WV` | West Virginia |
| `WY` | Wyoming |

## Column provenance

Every field maps 1:1 to a column in the `NAV_CKPT` table of `nasr.db`. Original FAA column names:

| GraphQL field | SQLite column |
|---|---|
| `effDate` | `EFF_DATE` |
| `navId` | `NAV_ID` |
| `navType` | `NAV_TYPE` |
| `stateCode` | `STATE_CODE` |
| `city` | `CITY` |
| `countryCode` | `COUNTRY_CODE` |
| `altitude` | `ALTITUDE` |
| `brg` | `BRG` |
| `airGndCode` | `AIR_GND_CODE` |
| `chkDesc` | `CHK_DESC` |
| `arptId` | `ARPT_ID` |
| `stateChkCode` | `STATE_CHK_CODE` |