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.

STCW & CDC Requirements

Liberia Ship Registry: Advantages for Seafarers and Ship Owners

Post author:Atomiq Team
Post published:July 15, 2026
Post category:GCC Maritime International Seaman Book Seafarers Seaman Book STCW & CDC Requirements
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The Liberia ship registry is the largest flag state in the world, covering more than 300 million gross tons — roughly 17% of the global ocean-going fleet. For ship owners,…

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
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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…

How Long Does It Take to Get a Seaman Book? Full Flags Compared (2026)

Post author:Atomiq Team
Post published:July 6, 2026
Post category:CDC CDC & STCW Processing CDC Application GCC Maritime International Seaman Book Seaman Book STCW & CDC Requirements
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How Long Does It Take to Get a Seaman Book?How long does it take to get a seaman book? is One of the most common questions for new and experienced…

STCW Certification Explained: A Complete Guide for Seafarers 2026

Post author:Atomiq Team
Post published:July 3, 2026
Post category:Crew Certifications Global Maritime Seafarers STCW & CDC Requirements
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STCW certification is the mandatory international qualification every seafarer needs before working on a commercial vessel. Set by the International Maritime Organization (IMO) under the STCW Convention 1978 (as amended…