| Abbreviation | Definition |
|---|---|
| IMBC | Isle Madame Boat Club |
| IMBRA | International Model Boat Racing Association |
| IMOCA | International Monohull Open Class Association |
| ISSA | International Sailing School Association |
| JASC | Jebel Ali Sailing Club |
| JBY | Jamestown Boat Yard |
| JMST | John Merricks Sailing Trust |
| JRSC | Jolly Roger Sailing Club |
| JSA | Junior Sailing Association |
| KBBC | Kuala Belait Boat Club |
| KDBA | KY Drag Boat Assc |
| KLSA | Kootenay Lake Sailing Association |
| KMSS | Kongsberg Maritime Shipping Systems |
| KOSA | Kuwait Offshore Sailing Association |
| KSBC | Kent School Boat Club |
| KUBC | Kingston University Boat Club |
| LAC | Light Attack Craft |
| LBBA | Leisure Boat Builders Association |
| LBRB | Little Bitty Rubber Boat. |
| LC | Landing Craft |