# Sefer İptal

> Independent IDO ferry tracker and analysis for the Sea of Marmara, in Turkish and English.

Operator records originate from İDO. Sefer İptal prepares the published analysis and experimental estimates. Historical articles cover a fixed archive through 14 September 2026; they are not live cancellation notices. Attribution guidance and limitations are visible on the source pages below. No raw archive or CSV/JSON data downloads are provided.

## Sources and attribution
- [Veri kaynakları ve atıf](https://seferiptal.com/veri-kaynaklari/)
- [Data sources and attribution](https://seferiptal.com/en/data-sources/)

## Live tracker
- [Türkçe](https://seferiptal.com/)
- [English](https://seferiptal.com/en/)

## Guides and published analysis
- [İDO sefer iptali nasıl kontrol edilir?](https://seferiptal.com/rehber/ido-sefer-iptali-nasil-kontrol-edilir/)
- [Lodos, poyraz ve feribot iptalleri](https://seferiptal.com/rehber/lodos-poyraz-feribot-iptali/)
- [İDO iptal istatistikleri: 2018–2026 arşivi](https://seferiptal.com/rehber/ido-iptal-istatistikleri-2018-2026/)
- [Feribot doluluğu: satılan koltuk ne anlatır?](https://seferiptal.com/rehber/feribot-doluluk-satis-verileri/)
- [Uzun sefer kesintileri nasıl okunmalı?](https://seferiptal.com/rehber/uzun-sefer-kesintileri/)
- [İDO seferi iptal olursa ne yapmalı?](https://seferiptal.com/rehber/ido-sefer-iptali-sonrasi/)
- [Sefer İptal hakkında: yayın yaklaşımı ve düzeltmeler](https://seferiptal.com/hakkinda/)
- [Gizlilik ve tarayıcıda saklanan bilgiler](https://seferiptal.com/gizlilik/)
- [Hat rehberleri](https://seferiptal.com/rotalar/)
- [How to check IDO ferry cancellations](https://seferiptal.com/en/guides/check-ido-ferry-cancellations/)
- [Wind, weather and ferry cancellations](https://seferiptal.com/en/guides/wind-weather-ferry-cancellations/)
- [IDO cancellation statistics: the 2018–2026 archive](https://seferiptal.com/en/guides/ido-cancellation-statistics-2018-2026/)
- [Ferry capacity: what sold seats actually tell us](https://seferiptal.com/en/guides/ferry-bookings-and-capacity/)
- [Understanding prolonged ferry service interruptions](https://seferiptal.com/en/guides/understanding-service-interruptions/)
- [What to do after an IDO ferry cancellation](https://seferiptal.com/en/guides/after-ido-ferry-cancellation/)
- [About Sefer İptal: editorial approach and corrections](https://seferiptal.com/en/about/)
- [Privacy and browser storage](https://seferiptal.com/en/privacy/)
- [Route guides](https://seferiptal.com/en/routes/)