Pure parsing library for NOTAM (Notice to Air Missions) strings. Supports both ICAO-format and FAA domestic (legacy) format NOTAMs. Parses raw NOTAMs into fully typed, structured objects. Contains no network calls or data fetching - consumers provide raw NOTAM strings however they obtain them (FAA NOTAM API, ICAO API, local feed, file dump) and the package returns structured results.

Part of the @squawk aviation library suite. See all packages on npm.

Usage

import { parseNotam } from '@squawk/notams';

const notam = parseNotam(
  'A1242/24 NOTAMN\n' +
    'Q) EGLL/QMRLC/IV/NBO/A/000/999/5129N00028W005\n' +
    'A) EGLL\n' +
    'B) 2404201400\n' +
    'C) 2404202200\n' +
    'E) RWY 09L/27R CLSD DUE TO RESURFACING CONSTRUCTION\n' +
    'F) SFC\n' +
    'G) UNL',
);

console.log(notam.id); // "A1242/24"
console.log(notam.action); // "NEW"
console.log(notam.qualifier?.fir); // "EGLL"
console.log(notam.qualifier?.subjectCode); // "MR"
console.log(notam.qualifier?.conditionCode); // "LC"
console.log(notam.locationCodes); // ["EGLL"]
console.log(notam.text); // "RWY 09L/27R CLSD DUE TO RESURFACING CONSTRUCTION"
console.log(notam.effectiveFrom); // { year: 24, month: 4, day: 20, hour: 14, minute: 0 }
console.log(notam.lowerLimit); // "SFC"
console.log(notam.upperLimit); // "UNL"

API

parseNotam(raw)

Parses a raw ICAO-format NOTAM string into a structured Notam object. Handles NOTAMN (new), NOTAMR (replacement), and NOTAMC (cancellation) action types. Parses the Q-line qualifier and items A through G:

• Q-line - FIR, NOTAM code (subject + condition), traffic type, purpose, scope, altitude limits, center coordinates and radius
• Item A - Affected location ICAO code
• Item B - Start of effective period (YYMMDDHHmm UTC)
• Item C - End of effective period, PERM (permanent), or EST (estimated)
• Item D - Schedule for intermittent activity (e.g. "MON-FRI 0700-1600")
• Item E - Free-text description of the condition or hazard
• Item F - Lower altitude limit (e.g. "SFC", "FL050")
• Item G - Upper altitude limit (e.g. "UNL", "FL180")

Accepts both multi-line and single-line NOTAM input. Gracefully handles NOTAMs without a Q-line when items A through E are present.

parseFaaNotam(raw)

Parses a raw FAA domestic (legacy) NOTAM string into a structured FaaNotam object. FAA domestic NOTAMs use a keyword-prefixed body format (RWY, TWY, OBST, AD, etc.) rather than the ICAO Q-line + items A through G structure. The recognized keywords are enumerated by the FaaNotamKeyword type.

Types

This package exports all NOTAM-related type definitions directly. Import types from @squawk/notams rather than @squawk/types:

import type { Notam, NotamQualifier, FaaNotam, FaaNotamKeyword } from '@squawk/notams';