SMS Chat and Text
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| OD | Ocean Diver (BSAC) | - | SMS Chat and Text |
| OW | Open Water Certification; First Certification Level. | - | SMS Chat and Text |
| OW(D) | Open Water (Diver) (PADI) | - | SMS Chat and Text |
| OWI | Open Water Instructor (BSAC) | - | SMS Chat and Text |
| OWIC | Open Water Instructor Course (BSAC) | - | SMS Chat and Text |
| OWSI | Open Water SCUBA Instructor (PADI) | - | SMS Chat and Text |