Table:
text: Underwater sports
World championships and world cups
World championships and world cups
Sport Body Year_ Event_type Location_ Nations
Underwater orienteering CMAS 1973 World Championship Lokve, Yugoslavia Not known
Underwater photography CMAS 1985 World Championship Genoa , Italy Not known
Underwater rugby CMAS 1980 World Championship Mullheim, Germany Not known
Underwater target shooting CMAS 1999 World Championship Not known Not known
Underwater video CMAS 2010 World Championship Fuerteventura , Canary Island , Spain 7

Question: What body participated in underwater sports in 1973?