Long Course (LC)/ Short Course (SC)
Simply, this refers to the length of pool. Short course refers to 25m pools and long course to 50m pools.
The two are not equivalent and when comparing times, conversion factors need to be applied.
Heat-declared Winner (HDW)
Most local galas will require the swimmers to swim each event only once. All times swam in heats will be collated and grouped by age-group to determine the rankings of the swimmers and make awards based on that. Some competitions may have a mixture of events decided in finals and events that are heat-declared, usually longer races.
"Open"
The word open can mean a few things in swimming so some context with it is needed. It can be used to describe a competition being open to other clubs rather than being invitation only, e.g. “open meet”. It can also refer to age limitations, or lack of them, e.g. “open age”. It can also refer to gender categories, where there is often an “open/male” category and separate female category. It is possible to have an open gender category separate from male but a convention is emerging to merge this with male.
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Upper & Lower Qualifying Times
Most galas will have entry requirements based on swimmer ability to ensure competitors are at the right level for the intended standard. These are in the form of qualifying times that a swimmer must have achieved or not achieved in a defined window preceding the competition. Many local galas actually exclude the fastest swimmers and have upper qualifying times – times that the swimmer must not have swam faster than. This gives less experienced swimmers chance to take part and to compete for medals. Lower qualifying times are times that a swimmer must have already achieved to show they are of a high enough standard. These competitions are usually intended as qualifying opportunities for higher level championship events such as county and regional championships. Occasionally, some galas will have both upper and lower qualifying times.
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FINA / WA Points
The swimming world governing body was known as FINA but has changed name to World Aquatics (WA). They have a system of rating swims by using the world record as a standard. The world record is set at 1000 points and swims times are scored relative to that. No account is taken of swimmer age, only the time is rated. This allows different events to be compared and can be used for setting targets. Most gala results will give times and also WA points. See here for technical details.
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Multi-Classification (MC)
This signifies para-swimming events. Para swimmers have disabilities assigned to distinct classes which reflect the different speed levels achievable with various disabilities. Times are compared to standard points tables per class, much like WA points, and event placings are decided on points scored, rather than absolute times. Standard times are based on the fastest times over the previous two years, rather than world records.
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