| Vessel Name | Vessel Type | Owner Company | Shipyard | Date of Built |
| 50 Let Pobedy | Icebreaker, 159.6 m.loa | Rosatom | Baltic Shipyard | 2007 - 03 |
| 7-Oceans | Seismic Support, 35 m.loa | Rederij Groen | Damen Maaskant Shipyard | 2014 - 07 |
| 7-Stars | Seismic Support, 35 m.loa | Rederij Groen | Damen Maaskant Shipyard | 2015 - 04 |
| 7-Waves | Seismic Support, 35 m.loa | Rederij Groen | Damen Maaskant Shipyard | 2014 - 10 |
| A. Efe | Dredger, 724 GT | Hipot Marine | Herman Suerken Gmbh | 1981 - 04 |
| Abalfadhel | Oilfield Pollution Control, 64 m.loa | Basra Oil Company | ENM Korea Gwangyang | 2021 - 05 |
| Abathar | Heavy-Lift Crane Ship, 2,000 swl | Ports of Iraq | GHI Yachts | 2013 - 06 |
| Abbotsgrange | Dredger, 1,863 GT | Arabian Dredging | Ferguson Bros. | 1967 |
| Abou el Barakat al Barbari | Research, 63 m.loa | Morocco Govt | Unknown Yard | 1969 - 03 |
| Abouzar 1200 | Derrick/Lay Vessel, 60 inch Pipe (max) | NIOC | Eriksbergs M/V | 1964 - 10 |
| Abu Faris | Dredger, 1,574 GT | BDC International | C. Hill & Sons | 1967 - 01 |
| Abu Safah | Maintenance, 75 m.loa | Saudi Aramco | Hyundai HI (Ulsan) | 2004 - 09 |
| Achilleas | Research, 32 m.loa | G. Tzanakos Shipping. | Burton Shipyard | 1964 - 10 |
| Achus-1 | Dredger, 1,915 GT | Al Namal Group | Appledore Shipbuilding | 1974 |
| Acrobata | Dredger, 1,053 GT | Unknown | Estaleiros Sao Jacin | 1980 |
| Acta Auriga | Accommodation Unit, 120 Accommodation | Acta Marine | Ulstein Ulsteinvik | 2018 - 03 |
| Acta Centaurus | Accommodation, 120 Accommodation | Acta Marine | Ulstein Ulsteinvik | 2019 - 04 |
| Acta Orion | Accommodation Unit, 80 Accommodation | Acta Marine | Central Ind Group | 2015 - 11 |
| Adamastor | Seismic Support, 34 m.loa | Olga Shipping Ireland | A & B Industries | 2000 - 05 |
| Adelfia | Dredger, 718 GT | Unknown Panamanian | Slob (De Vries) | 1990 |
| Adessa Legend | ROV/Submersible Support, 71 LOA | Unknown | North American | 1985 - 07 |
| Adhémar de Saint-Venant | Dredgers, 7,531 GT | Jan De Nul NV Group | AVIC Weihai Shipyard | 2017 - 06 |
| ADNOC 710 | Emergency Rescue Vessel, 8,000 HP | ADNOC Logistics & Services | Ast. Balenciaga | 2008 - 06 |
| Adolf Jensen | Oceanographic Survey, 30 m.loa | Greenland Institute | Orskovs Staal. | 1967 - 07 |
| Adriana | Dredger, 309 GT | Zwan | Scheepshellingen | 1960 - 01 |
| Adricristuy | Dredger, 240 GT | Canlemar | Unknown Yard | 1977 - 04 |
| ADV Ocean Protector | ROV/Submersible Support, 105 LOA | COA Gov | Aker Aukra AS | 2007 - 08 |
| Aegaeo | Research, 61 m.loa | HCMR | Chalkis Shipyards | 1985 - 12 |
| Aegir | Heavy-Lift Crane Ship, 4,000 swl | Heerema Marine Contractors Nederland BV | Daewoo (DSME) | 2013 - 05 |
| Aegis I | Emergency Rescue Vessel, 2,000 HP | Environmental Marine | Pattje Shipyards | 1974 - 09 |
| Aethra | Multi-Purpose Support, 94 m | Asso Subsea | Flekkefjord | 1999 - 06 |
| Afonso de Albuquerque | Dredger, 4,328 GT | Jan De Nul NV Group | Keppel Nantong | 2019 - 03 |
| African Inspiration | Multi-Purpose Support, 113 LOA | MPL | Havyard Leirvik | 2014 - 11 |
| African Storm | Heavy Lift, 2,022 DWT | Strategic Sea Lift | Martin Jansen | 1977 - 06 |
| African Vision | Multi-Purpose Support, 93 LOA | MPL | Keppel Singmarine | 2010 - 05 |
| AG Geodrill | Geophysical Survey, 48 m.loa | Java Offshore | Unknown Yard | 2016 - 02 |
| Aguila III | Offshore Service, 33 m.loa | Sociedad Matriz SAAM | Astilleros Detroit | 2004 - 03 |
| Ahmed Fadel | Multi-Purpose Support, 90 LOA | Suez Canal Authority | Huangpu Wenchong | 2017 - 04 |
| AI Avocet | Dredger, 1,639 GT | Aggregate Ind. | Damen Gorinchem | 1988 - 12 |
| Ain Dar 3 | Maintenance, 61 m.loa | Saudi Aramco | Mickon Marine | 1984 - 12 |
| Ajang Haidah | Maintenance, 75 m.loa | Ajang Shipping | Shin Yang S.Y. (1) | 2008 - 12 |
| Ajang Harapan | C,U & FP Lay, 74 LOA | Ajang Shipping | Pan United Indonesia | 1998 - 10 |
| Ajang Hormat | Maintenance, 75 m.loa | Ajang Shipping | PT ASL Shipyard | 2008 - 01 |
| Ajang Kinship | Research, 45 m.loa | Ajang Shipping | Cougar Shipyard | 2010 - 09 |
| Ajang Shariah | Emergency Rescue Vessel, 2,000 HP | Ajang Shipping | Nam Cheong Dockyard | 2003 - 12 |
| Ajang Star | Emergency Rescue Vessel, 2,025 HP | Ajang Shipping | Cougar Shipyard | 2011 - 10 |
| Ajang Syawal | Emergency Rescue Vessel, 1,341 HP | Ajang Shipping | Nam Cheong Dockyard | 1991 - 08 |
| Ajax R | Dredger, 587 GT | Rohde Nielsen | Arnhemsche | 1966 - 01 |
| Akademik | Research, 54 m.loa | Ban Io | Leninskaya Kuznitsa | 1979 - 01 |
| Akademik Aleksandr Karpinskiy | Geophysical Survey, 104 m.loa | Polar Marine | Chernomorskiy | 1984 - 04 |