This is the 12737th most frequent Korean word.
대한수영연맹
Korean Swimming Federation.
In this sentence, 대한수영연맹 refers to an organization that manages swimming-related activities in Korea.
대한수영연맹은 국내 수영 대회를 주관합니다.
The Korea Swimming Federation oversees domestic swimming competitions.
Here, 대한수영연맹 is the entity with which athletes register to participate in swimming events.
나는 대한수영연맹에 등록된 선수입니다.
I am an athlete registered with the Korea Swimming Federation.
The term 대한수영연맹 in this sentence is the creator of specific rules that the swimming pool follows.