Calculators. Decoders. No advice.

01 /  Live

Shipping today.

• Checklist

  Flight Planning Checklist

  Comprehensive pre-flight kneeboard — pilot fitness, AROW, weather brief, NOTAMs/TFRs, performance, fuel, plan, cockpit setup. Each line links to the agency or one of our calculators. Browse online, print as a kneeboard, or check items off as you brief. The manual version of what TallyAero does automatically.

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• Decoder

  NOTAM Briefing Decoder

  Paste a flight-plan briefing — every NOTAM gets parsed, classified, and scored against your route. FAA contractions expanded, Q-codes interpreted, "so what" derived from the agency's own fields. All client-side.

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• Calculator

  Density Altitude

  Field elevation + altimeter + OAT + dewpoint → pressure altitude, ISA deviation, density altitude with humidity correction. Performance impact narrative.

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• Decoder

  METAR / TAF Decoder

  Paste a raw METAR or TAF — wind, visibility, weather, ceiling, temp/dewpoint, altimeter all decoded. Flight category (VFR/MVFR/IFR/LIFR per FAA Order 7110.10) and density altitude derived from the agency's own fields. TAF change groups (FM/BECMG/TEMPO/PROB) recursively decoded.

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• Calculator

  Crosswind Component

  Wind direction + velocity + runway → headwind/tailwind + crosswind components. Steady + gust readout. POH max-demo crosswind comparison advice.

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• Finder

  Closest airport with X

  Pick an origin (your phone's GPS, an ICAO, or paste lat/lon) and the capabilities you need — runway length, hard surface, lit, towered, ASOS/AWOS, ILS/RNAV, arresting gear. Get the nearest matching airports across all 72,000 fields, ranked by great-circle distance with bearing. Pure browser-side; your origin coordinates never leave your machine.

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• Questionnaire

  Aviation Event Reporting Questionnaire

  A triage form for post-event reporting obligations across NTSB §830, NASA ASRS, FAA wildlife/laser/GPS/SUP, PHMSA hazmat, TSA security, §61.15 MV action, §67.403 medical, Part 121/135 SDR, school SMS, and insurance. Outputs a ranked list of every system to file with, mandatory→voluntary, with deadlines + links.

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• Checker

  49 CFR Part 830 Reportability

  Focused checker for NTSB §830.5 immediate-notification triggers and §830.15 10-day report criteria only. Use this when you specifically need to know whether to call NTSB. The Event Reporting Questionnaire above covers the rest of the agency landscape.

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02 /  Planned

On the build path.

• Decoder · planned

  Holding Entry

  Inbound course + present heading → direct, parallel, or teardrop entry. With the AIM 5-3-7 reference and a printable diagram for the right-of-flag rule.

• Calculator · planned

  Weight & Balance

  Aircraft empty weight, arms, fuel, payload → CG and gross weight versus the envelope. Save profiles per N-number. Tied to type-specific limits when we ingest TCDS data.

• Decoder · planned

  Currency Tracker

  14 CFR 61.57 currency clock — landings, instrument approaches, BFR, IPC, medical. Past lookback, future expiration, and what unfreezes what. Read-only — your real currency lives in your logbook.

Why no advice?

Tools tell you the math. They don't tell you whether your flight is legal, safe, or smart — that's your call as PIC. Every output here links to the agency reference (14 CFR section, AIM paragraph, aviationweather.gov endpoint) so you can verify and decide.

Conscious gap: AI-generated guidance lives one layer up in DashTwo, not in the Atlas. The Atlas is the deterministic graph; DashTwo reads the graph and answers questions that need judgment. The two ship separately so neither blocks the other.