All ten were crew members aboard the aircraft involved in the accident, the navy said
Tsai beat her former premier, William Lai, in a national tally for the independence-leaning Democratic Progressive Party's primary race, several television broadcasters and newspapers said.
The self-ruled island is set to hold its presidential election in January, amid heightened tension with China, which considers it a wayward province and has never ruled out the use of force to return it to the fold, if necessary.
The election made front-page headlines in April after Foxconn chairman Terry Gou joined the primary for the China-friendly opposition party in Taiwan.