★ Google 5.0800+ verified reviews on Google, Viator and GetYourGuide
Since 1967Family business on the Bosphorus
Free cancellationUp to 24 h before departure, refunded in full

Constantine Yachts Operates Under TÜRSAB Licence No. A-805

Constantine Yachts is the Bosphorus yacht brand of AST Turizm, a licensed Turkish travel agency whose roots go back to 1967. AST Turizm is a member of TÜRSAB (Association of Turkish Travel Agencies) with licence number A-805 — one of the early licence numbers in the Turkish registry.

Verify Us Independently

Do not take our word for it. TÜRSAB maintains a public registry of every licensed travel agency in Turkey:

  1. Open the official registry: tursab.org.tr/acenta-arama
  2. Search by agency name “AST TURİZM” or licence number “A-805“
  3. The record shows AST TURİZM, registered in Beyoğlu, İstanbul (Boğaziçi regional committee)

Why This Matters

Under Turkish law (Act No. 1618), organized tours may only be sold by licensed travel agencies. Booking with a licensed operator means a real legal entity stands behind your reservation — with the obligations and guest protections that licence carries. Unlicensed boat brokers offer none of this.

Our Cancellation Promise

Cancel free of charge up to 24 hours before departure — full refund of any prepayment, no questions asked. See our FAQ for details.

Questions? Reach us on WhatsApp or see contact details.

Frequently Asked Questions

Whose licence is A-805?

It belongs to AST Turizm, the licensed Turkish travel agency whose Bosphorus yacht brand is Constantine Yachts. When you book with us, AST Turizm is the legal entity behind the reservation. The story behind the brand itself is on our about Constantine Yachts page.

How do we verify the licence ourselves?

TÜRSAB keeps a public registry of every licensed travel agency in Turkey. Open tursab.org.tr/acenta-arama and search either the agency name AST TURİZM or the licence number A-805. The record shows AST TURİZM registered in Beyoğlu, İstanbul, under the Boğaziçi regional committee.

Why does a travel agency licence matter for a boat trip?

Under Turkish law, Act No. 1618, organised tours may only be sold by licensed travel agencies. Booking with a licensed operator means a real legal entity carries the obligations and guest protections that the licence brings. Unlicensed boat brokers offer none of that.

What is TÜRSAB?

TÜRSAB is the Association of Turkish Travel Agencies, the professional body that registers and lists licensed agencies in Turkey. Membership is a matter of public record, which is why we point you to the registry rather than showing you a certificate image. Our AI knowledge card follows the same principle: every fact on it is dated and can be checked elsewhere on this site.

How long has the agency been operating?

AST Turizm’s roots in tourism go back to 1967, and A-805 is one of the early licence numbers in the Turkish registry.

What is your cancellation policy?

Free cancellation up to 24 hours before departure, with any prepayment refunded in full. Special dates such as New Year’s Eve carry their own terms, stated on their own pages.