Research vessels by country include:
Denmark
See also List of Danish research ships, which includes ships used only for expeditions
In addition to Danish research ships, Faroe Islands (self-governing part of the Kingdom of Denmark) operate their own:
- R/V Jákup Sverri (2020–present)
In addition to Danish research ships, Greenland (self-governing part of the Kingdom of Denmark) operate their own:
- R/V Sanna (2012–present)
- R/V Tarajoq (2021–present)
Japan
- RV Chikyuu
- RV Hakurei Maru
- RV Hakuho Maru
- RV Kairei
- RV Kaiyo
- RV Mirai (formerly, Mutsu)
- RV Natsushima
- RV Shigen (formerly, RV Ramform Victory of Petroleum Geo-Services)
- RV Umitaka Maru
- RV Yokosuka
- RV Nisshin Maru
Japan Maritime Self-Defense Force operated vessels
- Shirase
- JS Suma (AGS-5103)
- JS Wakasa (AGS-5104)
- JS Nichinan (AGS-5105)
- JS Shonan (AGS-5106)
United Kingdom
- RV Sepia Plymouth Marine Laboratory
- RV Squilla Plymouth Marine Laboratory
- RV Tamaris Plymouth Marine Laboratory
- OWS Cumulus (Ocean Weather Ship)
RRS Discovery (III), retired at the end of 2012 after 50 year's service.
(London & Glasgow Universities)
(Swansea)
- RV Coda Octopus Guiding Light
P&O Maritime
(Bangor University)
- RV Roagan
- RV Marisa of Liverpool
- FRV Alba na Mara
- FRV Scotia
(National Marine Service)
Agri-Food and Biosciences Institute, Northern Ireland
Gardline Geoservices Ltd
- RV Coastal Surveyor
- RV Ocean Discovery
- RV Ocean Endeavour
- RV Ocean Observer
- RV Ocean Researcher formerly RRS Charles Darwin
- RV Ocean Seeker
- RV Triton
Others