| Abbreviation | Definition |
|---|---|
| SSYC | Shrewsbury Sailing and Yacht Club |
| SUO | Sailboat Under Offer |
| SUSA | Scottish Universities Sailing Association |
| SY | Sailing Yacht |
| TACS | Traverse Area Community Sailing |
| TBSC | Tankerton Bay Sailing Club |
| TBSC | Trearddur Bay Sailing Club |
| THSC | Toronto Hydroplane and Sailing Club |
| TISC | Thorney Island Sailing Club |
| TSBP | Thames Sailing Barge Parade |
| TSC | Tuscaloosa Sailing Club |
| TSS | Tactical Sailing Situations |
| TYCC | Tampa Yacht and Country Club |
| UKBSA | United Kingdom Board Sailing Association |
| UKSA | United Kingdom Sailing Association |
| USSA | United States Sailing Association |
| UTSC | University of Texas Sailing Club |
| UTSC | Upper Thames Sailing Club |
| VYBA | Venice Youth Boating Association (Venice, FL) |
| WCSC | Western Carolina Sailing Club |