to navigate along the seashore or river bank (see Molina, who gives this example in the first person singular)
Alonso de Molina:
atentli nictoca. (pret. atentli onictocac.) yr costeando o por la ribera. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7v. col. 2. Thanks to Joe Campbell for providing the transcription.