These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a East London Airport to Port Louis Sir Seewoosagur Ram. Airport flight would often be abbreviated as a ELS to MRU flight. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Mont Lubin Rodrigues Is Airport (RRG).