Our Society, the International Yacht Marine Certification Society (iymcs), was founded in 2020.

From the inception of iymcs the founders have worked to develop a course certification structure to meet international maritime and educational standards. These have been received well by Maritime schools and colleges around the world. Further it has been acknowledged by many industry professionals as containing a high level of professionalism and integrity within the structure and design of the courses and certifications.

Our Quality Management System focuses on our Society’s operations. Our Members are audited and certified by the British Standard Institute (BSI Netherlands).

I am pleased to announce that in 2022, our Society was approved and officially registered at the Centraal Register Kort Beroepsonderwijs (CRKBO) as a Dutch Educational Society. The CRKBO is the Central Register for Short Vocational Education. Admittance into this register is exclusive to educational institutions that operate within the quality code and regulations set forth by the Dutch government within the European Union guidelines for quality vocational education. Registration only occurs after successfully passing an audit by an independent body designated by the Dutch government the Centrum Post-Initieel Onderwijs or Center for Post-Initial Education (CPION).

Our unique range of courses and certifications are well structured and adhere and or comply with the IMO conventions and the various Maritime Administrations Codes of Practice. The course syllabus is modern and dynamic and underpinned by good sound depth of knowledge. Through this, students/candidates achieve a true level of compentency within the Certification of Competency they embark on.

Our Members are an integral part of our Society. Our Society works for its Members. Thank you for taking the time to visit our website. Specific information regarding our Society? Read on below:

Kindest regards

Roger G. Harrison.
Managing Director.

Roger G. Harrison

Managing Director & Founder.


Roger started sailing as a boy, and grew-up building sailing cruisers in the family business. He started a career at sea by joining the naval cadets and became one of the youngest cadet instructors at 15, and thereafter trained as a deck officer in the merchant navy. After several years at sea, he worked for various marine equipment manufacturers in R & D and technical sales and then worked as a head buyer for a major chain of chandlery shops in the UK. He gained two college national diplomas in; Business & Accounting, Marketing. Roger has sailed dinghies to large superyachts, cruised & raced both offshore and ocean, as a Navigator or Skipper. He has taught recreational yachting courses to yacht master level. During the last 10 years, he has captained large motor yachts up to 30 mtrs. In 2003, Roger joined a major training organisation and undertook various vocational teacher training courses. Since then, he has formed and managed several professional schools, and regulalarly acts as an advisor for numerous schools & colleges worldwide as well as gaining teaching experience in them. Over the years, he has trained more than 1500 students at a professional level teaching the Master 200 Limited power & sail, UnLimited ocean astro for OOW's, maritime business & law, radar & pilotage navigation and radio GMDSS. He is professionally trained Archipelago Baltic pilot for small vessels. He works as a school auditor, examiner and instructor trainer. He is an active yacht industry consultant on business and owner projects, and undertakes development work of teaching techniques, he is currently writing two white papers on crew working practises.

Guy Odell

Operations Director & Co-Founder.


Guy attended Technical college and obtained an HND in High Tech Engineering and then worked for numerous companies in the offshore services industry in Europe, Africa, the Middle East and Asia, at an operational and management level. He qualified as an Internal Auditor for ISO for operational safe-working practices. He worked as a consultant and then joined the Board as Director of several offshore services companies in oil & gas exploration. He was actively involved as a senior project manager in the design of RV's & DP's, precision navigation, geophysics studies, hydrographic data and dynamic positioning analysis. He has extensive vessel surveying and compliance experience. Guy has a strong business background and in various roles, has developed various commercial projects for multinationals. Recently he was appointed as a vice-chairman of a large multi-national company in offshore services managing a large fleet of commercial support vessels operating worldwide and was responsible for compliance standards. He has been sailing since a boy and is currently the Owner and Captain of a 22 mtr sailing yacht. He is a qualified instructor and examiner.

Sergey Tagashov

Executive Director & Co-Founder.


Sergey holds a Sail/Power 200GT Limited professional certification and has 20 years of small vessel sailing experience on the East coast of the US, in the Caribbean, the Eastern Mediterranean, the Baltic and North Sea. While living in the US, he has been a Member and Board Member (Maintenance Director) of The Sailing Club of Washington. Sergey holds two Master's Degrees including an International Master of Business Administration from the Moore School of Business (University of South Carolina) with a focus upon operations management. Sergey's 30-year long career took him around the world in both public service and business capacities. He has extensive experience in international diplomacy and in international business operations management in the energy/mineral sector. Sergey resides in the Netherlands, where he co-founded iymcs. In addition to his native Russian, he is a fluent speaker of English and Dutch and has a good comprehension of French and Spanish.

ISO9001:2015 Certifying Body & External Auditors:

The British Standards Institute (BSI).

BSI Certification Number: QSC 921.

Certification Scope:
"Provision of approved training courses to members including individual certification services".

BSI External Audit Frequency: Yearly.

ISO Internal Auditor:

Mr C. V. Ciovlica
BA Business Management, Finance & Accounting.

Dr Stephen Price, PH.D.
United Kingdom.
Areas of Expertise:
Watchkeeping Practices, IRPCS, ISM, BRM,
Professional Course Syllabus & Examinations.

Commander P. Flyghed.
Areas of Expertise:
Maritime Law, Professional Teaching Practices,
BRM, ISM, SOLAS, Navigation & Radar,
Pilotage, Examination & Assessment Practices.

Mr D. Simon.
Areas of Expertise:
Recreational School Organisation,
Instructor Training, Course Books Editorial,
Recreational Course Syllabus & Assessments.

Capt(RET) S. Cojocaru, PH.D.
Areas of Expertise:
STCW 1978/2010 Convention, GMDSS, ECDIS,
Flag Recognition & Course Approvals.

Mr P. Leube, Dipl. Ing.
Areas of Expertise:
Marine Architecture & Engineering, Surveying,
Yacht Design R & D, Production Yacht Construction,
Project & Super-Yacht Management, ISM Auditing.

Capt(UnLimited). C. Wassenaar, B.ED.
The Netherlands.
Areas of Expertise:
Classic Sail Vessels & Tall-Ships, Teaching Practices, Examination Syllabus & Processes, Small Commercial Vessels.

Data Protection & Confidentiality.

The Society holds data of its appointed Officers, Directors, as well as Members, Students and Candidates. The Society retains such data in accordance with the EU GDPA 2018 with approved amendments for the DPA United Kingdom Data Protection Act (DPA) 1998.
As a “Society” policy, we do not sell or distribute personal or corporate “Member” data to 3rd-parties.
The iymcs website deploys cookies solely for the purpose of data form filling. Further information is available here

Equal Opportunities Policy.

Our “Society” is an Equal Opportunity Employer and refuses to accept any form of discrimination and/or harassment in the workplace. Our “Society” is committed to the principle of equal employment opportunity for all our staff and to provide them with a friendly work environment that is free of discrimination and harassment. Further information is available here

Copyright & Trademarks.

The text content contained here within the iymcs website is copyrighted and protected under the EU Directive 2019/790. The images contained within are the property of their author and a credit is shown at the bottom of each webpage where the image appears.
The name iymcs is a trademark of the International Yacht Marine Certification Society BV.
The following courses and certifications are trademarks of the International Yacht Marine Certification Society BV:

Master 10GT/12m™ Master 20GT/15m™
Master 40GT/17m™ Master 40GT/20m™
Master 80GT/Mate 200GT™ Master 200GT/Mate 500GT™
Master 300GT/OOW 1000GT™ Master 300GT/Mate 1000GT™
Watchkeeper 80GT/24m™ UnLimited OOW Ocean Astro™
Deck Engineer 40GT™ Open-Sportsboat 10m™
Deck Engineer 80GT™ Cosmopolitan Steward/ess™
Deck Engineer 200GT™ Yacht-Tender Crew 15m™
Ocean 20/40™ DeckCrew™