Olympic Qualifyng Time (OQT) 1:47.97 - NOC can enter up to 2 swimmers with OQT.
Olympic Selection Time (OST) 1:51.75, invitantional - A swwimer meeting the "invitation" standard was eligible for entry. But this entry was allotted/filled by ranking.
Olympic Qualifyng Time by NOC - 38 Swimmers - addtional 11 Swimmers.