CIRRUSFOLDCLEAR-SKY PASSAGEA little altitude. A different sky.
EIGHT QUIET CROSSINGS · A ROUTE-PLANNING GAME

A small change.
A clearer sky.

Ice-rich air can turn a passing trail into a lingering cloud. Shape a gentle altitude profile, watch your fuel, and find a clear passage through the blue hour.

FUEL
TRAIL POINTSless is clearer
FLIGHTReady

Drag the white marks up or down. Endpoints stay fixed. Mint arrows mark easier cruising air; shaded rose bands are ice-rich.

WELCOME ABOARD

Plan gently. Fly clearly.

Drag the seven interior marks to choose an altitude from 30,000 to 36,000 feet. You can also select a numbered waypoint and use the altitude buttons, or focus the chart and use the arrow keys.

Rose bands mark cold, ice-rich air. Passing through them adds trail points. Mint arrows mark easier cruising air. Climbing and flying farther from those arrows use extra fuel.

Each crossing limits the altitude change per leg. Keep the route gentle, and stay within both allowances to earn clearance. Use the exact lowest fuel to earn a gold wing.

Fly this plan to watch the crossing and its trails. Pause or return to planning at any time. Undo restores edits; Reset starts the route over. Your best clearance remains in the logbook.

There is no penalty for trying again, and no timer while you plan.