MASA stands for Missionary Aviation Support Association. Below is a link explaining its ties to Oshkosh and EAA.
Every July, Wesley serves approximately 200 missionaries and families who have come to the EAA to spread the news of God’s work through aviation and highlight the possibilities for others to serve. Thursday, July 26th is the day we at Wesley are the hosts for all the missionaries.
MASA is the local group that makes possible the attendance of missionaries. For many of the missionaries, the cost would be too great to come if it were not for MASA. MASA helps them through meals, places to sleep, cars, and pick-ups at airports. The missionaries, in turn, serve us by speaking at many churches on the first and last Sunday of EAA.