Daily challenge
How good is your distance eye?
One lane per UTC day — the same one for every visitor. Guess the modelled sea-route distance in nautical miles and see how close you get.
25 Oct 2026 · same lane worldwide
Busan Hamburg
Route model runs via suez. Guess the sea-route distance in nautical miles.
Distances are planning estimates over our modelled sea-route network — the same figures the port distance calculator uses. Your guesses and streak live in this browser's storage only; nothing is sent to us. Come back tomorrow for a new lane.
How it works
Same lane. Same scoring. Every day.
Deterministic
The UTC date picks the lane from our curated index — no account, no randomness, no spoilers.
Scored on closeness
±2% earns 1000 points; ±35% still earns 100. One guess per day — make it count.
Local only
Your streak is stored on your device. Clearing browser data resets it — we never see it.
Get in touch
Keep the streak going.
Today's desk has the regulatory calendar, lane and port of the day — same data, dated daily.