original_query: When were the lead ships of the Donghae-class corvettes and the updated Pohang-class corvettes launched?
query: When were the lead ships of the Donghae-class corvettes and the updated Pohang-class corvettes launched?
answer: The lead ship of the Donghae-class corvettes was launched in 1982, and the lead ship of the updated Pohang-class corvettes was launched in 1984.