Get the most recent reported position of an aircraft by flight number or registration (tail): latitude, longitude, altitude (ft), track (deg), and ground speed (kt), along with callsign, type, and origin/destination when known. Returns the freshest available fix.

Compute sunrise, sunset, civil twilight begin/end, solar noon, and day length for a location (latitude/longitude) on a given UTC date (defaults to today). All times are returned as ISO-8601 UTC. Useful for day/night and lighting determinations. Deterministic; no lookup.

Get the current automatic terminal information (ATIS) for an airport by ICAO code: the active information code (letter), issue time, arrival/departure designation, and decoded temperature/dewpoint, plus the full information text. Falls back to the latest surface observation when no current ATIS is published.

Compute the crosswind and headwind/tailwind components for a runway given the runway heading and the wind direction and speed. Returns the angle off the nose, the headwind component (negative for a tailwind), the crosswind magnitude, and which side the crosswind comes from. Deterministic; no lookup.

Decode a raw NOTAM into structured fields. Extracts the NOTAM id and type and the ICAO field markers (Q/A/B/C/D/E/F/G) when present, isolates the free-text body, and expands common aviation contractions (RWY, TWY, CLSD, U/S, etc.) into plain language. Pure decode of caller-supplied text.

Compute pressure altitude and density altitude from field elevation, outside air temperature, and altimeter setting (hPa or inHg; defaults to standard). Returns pressure altitude, the ISA temperature at that altitude, and density altitude — the performance-relevant altitude for takeoff/climb planning. Deterministic; no lookup.

Get the current flight-rules category (VFR, MVFR, IFR, or LIFR) for an airport by ICAO code, derived from the latest observed ceiling and visibility. Returns the category plus the underlying ceiling (ft) and visibility (statute miles). A compact, decision-ready signal for routing and go/no-go logic.

Compute the great-circle distance between two coordinates (in nautical miles, kilometers, and statute miles), the initial and final true bearings, and — when a ground speed is supplied — the estimated time en route. Deterministic; no lookup.