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Underwater inspection is a much sought-after skill around the world and TWI’s training will allow you to gain the necessary skills and qualification to access the many employment opportunities this provides.

TWI’s industrially recognised and respected underwater inspection courses allow you to reach qualification at four different levels, using commercial diving skills and inspection knowledge in this specialised area.

Realise your potential with TWI

Hayley Barret

Case study

Hayley Barret was already unknowingly preparing for her future career by enjoying years of recreational scuba diving.

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Career path

Join our FREE 7-day trial of The Welding Institute’s new Jobs website and find your dream job now!

The internationally recognised CSWIP Underwater Inspection and NDT programme has a defined career path which enables you to keep developing your skills and progress in this rewarding profession.

View the career map

Why choose TWI?

We are in the unique position of being able to offer both training and examinations together at one of our purpose-built facilities around the world.

Refresher training courses

These refresher training courses are ideal to prepare you to take a recertification exam:

Achieve your goal with TWI

Marek Wojcik

Case study

TWI Senior Subsea Inspection Lecturer and Project Team Leader, Marek Wojcik has been awarded with an Honourable Mention by the Divers Qualification Board of the Republic of Poland.

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A Career in Underwater Inspection

Find out more from Marek Wojcik, TWI’s Underwater Team Manager

Did you know?

documents to bring

What do I bring?

For CSWIP 3.1U and 3.2U courses/exams: log book, commercial diver ticket, HSE approved diving medical.

For all underwater courses: 2 x passport photos and a valid eye test.

underwater diver

Underwater modules – diving equipment

You will not need to bring your own equipment as it will be provided for courses and examinations taken at TWI facilities.


Certificate renewal

3.1U, 3.2U, ROV 3.3U Divers/Underwater Inspection Controller 3.4U - you are required to sit an examination at every 5 year renewal point. For more information, please contact us to book the examination.


Globally recognised qualifications

You can access the scheme documentation which includes detailed information regarding entry requirements here

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Professional Membership of The Welding Institute

Membership gives you access to all the technical knowledge that you need and will also make it easier for you to achieve your own personal learning and development goals.

You can also qualify for a 5% discount on training courses. Find out more!

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Continuing Professional Development

You can gain CPD points when attending this course - Find out more!

Frequently asked questions

Try our list of frequently asked questions.

If you can’t find an answer, please contact us using the button below: Contact customer services

Do I have to bring my own diving equipment?

No, all diving equipment is provided for courses and examinations taken place at TWI facilities.

How long are the CSWIP qualifications valid?

All CSWIP underwater qualifications are valid for 5 years. The certificates are renewed by attending an examination at an approved TWI centre.

Where can I take the CSWIP Underwater courses?

TWI has diving facilities in Middlesbrough in the UK, Chonburi in Thailand and Baku, Azerbaijan – this is where the 3.1U and 3.2U NDT Inspection training and examinations take place. For courses that do not require a diving tank (3.3U ROV Inspector and 3.4U Underwater Inspection Controller) the venues are worldwide.

My certificate is up for renewal, how do I do this?

To renew your certification you will need to successfully complete a renewal examination. A renewal examination can be taken from 6 months prior to the expiry date upon till the ticket expires. We would strongly advise attending refresher training prior to your examination.

What is the career progression for certificate holders?

For information on the career progression for CSWIP certificate holders please follow the below link to view the Underwater career progression map