SOS Logo 2.png

CMSS is rebranding to SOS - Specialist Offshore Support as of the 1st of January. We will be launching our new website in the coming weeks so please check back. We can still be contacted with the same contact details on this site. 



Services to suit your needs in, on, over or near the water


From shallow water craft to powerful offshore RIBS, we have safety boats and rescue boats to suit your needs.


Whatever the project, the right craft for the right environment - however hard the access.

Pontoon on canal

Modular pontoon systems.  Ideal for surveys, bridge repairs, events, filming and more.

Why choose CMSS?

National cover with a strong local ethos

At CMSS, we have crews and skippers based all over the UK, as we believe in creating work opportunities for the local people and economy.  Our local crews also mean that we have nationwide coverage at short notice and we can provide flexible coverage 24/7 on all safety boats, survey boats and work boats if needed.

Safety is our middle name

We go above and beyond national requirements to ensure your safety when providing cover and that is why all of our fleet is MCA-coded and we only use fully qualified crews and skippers.  Our varied fleet is designed to suit specific jobs so we can tailor our services to your requirements.  In addition, we can also offer safety training for a range of requirements.



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Alan Picken,

James Fisher Marine Services

CMSS recently supported James Fisher Marine Services with a seabed sampling scope in the River Dee estuary area, they provided one of their Commercial RIBs along with the skipper to transport personnel and equipment out to the location for the sampling works.  Their service was very professional and punctual and competitively priced.  We look forward to working together with CMSS on future projects.

Mike Mayhew,


CMSS provide and maintain Safety and Support RIBs for West Kirby Sailing Club, the largest UK sailing club north of London.  Our Safety Boat fleet is a vital piece of our infrastructure and National Marine not only maintain through regular servicing, but also provide ad-hoc and emergency service or replacement when repairs are made.  They are also our preferred supplier of commercial standard RIBs, engines, trailers and specialised 316 stainless steel bespoke boat parts and fittings.  CMSS are a friendly family run business, always polite and understanding of our needs and provide a first class service to WKSC.

Nigel Peake,

Regarding engine installation

Thank you for the lovely neat job you made on the installation of the outboard.  I didn't have a chance to take her out yet but having had a look at the install I was really pleased.


Just some of the companies we're proud to work in partnership with:

BBC, McDonalds, Costain, Story Contracting, Bam Nuttall, Hollyoaks, CH2M and The Environment Agency. 

Find out more about who we can work with here.



Make an enquiry

For any enquiries or questions, please call: 0151 909 8067 or complete our form using the button below:

Head Office

Marine and Site Building, Riverbank Road, Bromborough, United Kingdom, CH62 3JQ



Tel: 0151 558 8067


© 2020 by Commercial Marine Support Services Ltd

Company number 12451368, registered in England and Wales

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