CARs & Contrail
Quick-reference calculations for CARs 604, 703/704/705 and Contrail requirements.
Canadian duty & rest calculations, simplified.
CARs 604 • 703/704/705 • Contrail
A quick-reference tool that puts the most useful duty-day information in one place.


DutyRest keeps the core calculation simple while supporting the details that can make a duty day harder to work through.
Quick-reference calculations for CARs 604, 703/704/705 and Contrail requirements.
Bring qualifying split duty and minimum-rest requirements into the same workflow.
Useful for operations where crew complement changes the applicable duty limits.
Account for FDP start and end locations when a duty period crosses time zones.
Keep the active FDP countdown visible without repeatedly reopening the app.
Medevac-specific duty regulation support is planned for a future update.
Enter the applicable duty details and DutyRest brings the most useful outputs forward: FDP remaining, latest allowable end, minimum rest, compliance status and earliest next FDP.
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