After learning that Yafet was deaf, i did some searching and found that he attended the Tennessee School for the Deaf (Knoxville) and was very involved in sports including basketball, football and track\field. I'm assuming he was in very good athletic shape. He was born in Ethiopia. A friend of mine now in Seaside said the two guys who made it to shore had to 'sign' to get people to call 911, so they may have been his school mates.
While searching i also ran across a few websites listing Berhanu (male) and Wubit (female) Yosepf as East African Baptist missionaries currently living in Ethiopia, but the sponsor church is in Jefferson City, TN. The website states: "BIO (Baptist International Outreach) was organized in 1985 for the purpose of opening countries closed to the Gospel by means of deaf education and other symbiotic methods that do not violate Biblical principles”. I see the spelling of the last name is slightly different, but there seems to be the possibility for a connection.