Glossary of maritime terminology
- Dark Fleet
- Davits
- Day of the Seafarer
- Deadweight Tonnage (DWT)
- Deck
- Deck Barge
- Deck Cadet
- Deck Crane
- Deck Department
- Deck Equipment
- Deck Machinery
- Deck Officer
- Deckhand
- Deckhouse
- Delta
- Demurrage
- Derrick
- Diesel Generator
- Diesel Generator Engine
- Disabled Ship
- Discharge Port
- Diving Support Vessel
- Dock
- Dockage
- Dolphin
- Domestic Seawater System
- Doppler Speed Log
- Draft
- Drag
- Dredge
- Dredger
- Dredging
- Drift
- Drillship
- Dry Bulk Cargo
- Dry Cargo
- Dry Cargo Ship
- Dry Dock
- DSV
- Dunnage
- Duty
- DWT