sa tu satyavrato rājā
jñāna-vijñāna-saṁyutaḥ
viṣṇoḥ prasādāt kalpe 'sminn
āsīd vaivasvato manuḥ
saḥ - he; tu - indeed; satyavrataḥ - Satyavrata; rājā - the King; jñāna-vijñāna-saṁyutaḥ - enlightened in full knowledge and its practical use; viṣṇoḥ - of Lord Viṣṇu; prasādāt - by the mercy; kalpe asmin - in this period (ruled by Vaivasvata Manu); āsīt - became; vaivasvataḥ manuḥ - Vaivasvata Manu.
Śrīla Viśvanātha Cakravartī Ṭhākura gives his verdict that Satyavrata appeared in the Cākṣuṣa-manvantara. When the Cākṣuṣa-manvantara ended, the period of Vaivasvata Manu began. By the grace of Lord Viṣṇu, Satyavrata received instructions from the second fish incarnation and was thus enlightened in all spiritual knowledge.