What is the difference between a CDC and a Seaman Book?

In most cases they refer to the same document. “Seaman Book” is the common name, while “Continuous Discharge Certificate (CDC)” is the official term used by flag states. Both serve as your seafarer identity and sea-service record.

Is a CDC certificate valid in all countries?

A CDC issued by a recognised flag state — such as Panama — is accepted by shipping companies and port authorities across the UAE, Qatar, Saudi Arabia, Bahrain, the Bahamas, and Europe. Always confirm the requirements of the specific flag and vessel you plan to join.

How long does it take to get a continuous discharge certificate?

Processing times vary by flag state and how complete your documents are. Applying through an experienced agency, such as for a Panama Seaman Book, is usually the fastest way to avoid delays and rejected paperwork.

Does a CDC certificate expire?

Yes. A CDC has a validity period set by the issuing authority and must be renewed before it expires. You should also keep it updated with every signing-on and signing-off entry throughout your career.

Maritime certifications

How to Renew Your Seaman Book Without Losing Vessel Assignments

Post author:Atomiq Team
Post published:July 17, 2026
Post category:CDC CDC Application Foreign Seaman Book GCC Maritime Global Maritime International Seaman Book International Sefarers Maritime certifications Renewing CDC Seaman Book
Post comments:0 Comments

To renew your seaman book without losing vessel assignments, start the renewal 3–6 months before expiry, prepare your documents in advance (passport, medical certificate, STCW certificates, sea service records), and…

Top 10 Flag States for Seafarers: Panama vs Liberia vs Bahamas

Post author:Atomiq Team
Post published:July 13, 2026
Post category:GCC Maritime Global Maritime International Seaman Book Maritime certifications Seafarers
Post comments:0 Comments

What is the flag state ? Which Flag States for Seafarers Ensure Better Compliance and Crew Welfare?A flag state is the country where a ship is registered, and its laws…

Seaman Book Requirements for New Applicants: Complete 2026 Checklist

Post author:Atomiq Team
Post published:July 10, 2026
Post category:CDC & STCW Processing Entry-Level Seafarers Filipino Seafarers Maritime certifications Seafarers Seaman Book STCW & CDC Requirements
Post comments:0 Comments

Before you can sign on to any commercial vessel, you need a seaman's book — and knowing the seaman book requirements for new applicants is the first real step in…

BOSIET vs HUET: Which Offshore Seaman Safety Course Do You Need in 2026?

Post author:Atomiq Team
Post published:July 3, 2026
Post category:Crew Certifications Maritime certifications offshore Course offshore worker
Post comments:0 Comments

BOSIET vs HUET course both are gold-standard OPITO-approved offshore safety courses, they serve entirely different career paths. BOSIET/HUET are governed by OPITO (Offshore Petroleum Industry Training Organisation) and are universally…

IMO and ILO Maritime Regulations All Seafarer Should Know

Post author:Atomiq Team
Post published:July 1, 2026
Post category:Maritime certifications Seafarers
Post comments:0 Comments

IMO and ILO maritime regulations seafarer rights form the two legal pillars that govern every merchant vessel at sea. The IMO sets safety and pollution standards, while the ILO protects…