| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| EARTH WIND FIRE AND WATER LIMITED | 10089509 | 30/03/2016 | One Red Flag |
| MARINE INFORMATION ALLIANCE LIMITED | 04351072 | 20/08/2002 | Dissolved |
| Ocean Numerics Ltd | 03936569 | 29/02/2000 | Dissolved |
| PML APPLICATIONS LTD | 04232750 | 18/05/2009 | Silver |
| SOCIETY FOR UNDERWATER TECHNOLOGY(THE) | 00932590 | 13/12/2016 | Silver |
| The Earth Centre | 02515008 | 23/01/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BMT CORDAH LIMITED | SC163413 | 24/01/2011 | 01/04/2016 | Dissolved |
| BMT SHIP & COASTAL DYNAMICS LIMITED | 02853718 | 01/10/2013 | 01/04/2016 | Dissolved |
| FUGRO GEOS LIMITED | 02985431 | 18/11/1994 | 05/07/2005 | Dissolved |
| FUGRO SWINDON LIMITED | 02734346 | 27/07/1992 | 05/07/2005 | Dissolved |
| GEMS SURVEY LTD | 03083699 | 01/10/2006 | 11/07/2011 | Dissolved |
| Installocean Ltd | 02377282 | 19/03/2002 | 05/07/2005 | Dissolved |
| OCEAN SCIENTIFIC INTERNATIONAL LIMITED | 02351541 | 04/08/2003 | 01/07/2006 | Bronze |
| PLYMOUTH MARINE LABORATORY | 04178503 | 01/02/2009 | 31/01/2023 | Silver |
| SAFETY CHECK LIMITED | 02418371 | 01/01/1992 | 05/06/1996 | Dissolved |
| SOCIETY FOR UNDERWATER TECHNOLOGY(THE) | 00932590 | 14/12/2006 | 06/12/2012 | Silver |
| SONARDYNE INTERNATIONAL LIMITED | 01299452 | 01/04/2006 | 01/05/2022 | Gold |