| Begriff | Definition |
|---|---|
| o.a. |
Over All |
| OA |
Over Aged |
| OBO |
Ore / Bulk / Oil Vessel |
| OILREC |
Oil Recovery |
| ONW |
Onwards |
| OO |
Owners Option |
| OP |
Operator |
| OPA 90 |
The US Oil Pollution Act of 1990 |
| OSH |
Open Shelter Deck |
| OT |
On Truck |
| OVERBOARD |
Over the side or out of the ship |
| OW |
Owners |
|