JMNT(i)
25 Yet during the fourth watch period of the night (about three o'clock in the morning), He came toward (or: to) them – continuing in walking upon the lake (or: sea).
26 But the disciples, upon seeing Him progressively walking about – upon the lake (sea), were at once shaken and troubled, one after another saying, "It's a ghost (or: a phantom; or: an apparition; or: the effect of something being made visible)!" – then they cried out from fear.
27 Yet Jesus at once spoke to them, proceeding in saying, "Continue in confidence and courage: I AM (or: I am Being; I am continuous Existence; or: = Take heart and continue courageous – It's ME)! Do not continue being afraid."
28 Now in a considered and discerning response, Peter said to Him, "Lord (or: O Master), since You are (or: if You are You; = if it's really You), direct (or: order) me to at once come toward You upon (= on the surface of) the waters!"
29 So He said, "Come at once!" (or: "Go [for it]!") Then, upon stepping down from the little boat, Peter at once walked about upon the waters and came toward Jesus.
30 Yet while continuing in looking at [the effects of] the strong wind, he was made to fear (or: became afraid). And then beginning to progressively sink down, he cried out, saying, "O Lord (Master), save me now (rescue me quickly)!"