To add onto what I said, Deku’s Faux 100%, which only has the implications of being as fast as all might in the past, blitzed Nagant’s sniper bullets, and at a minimum of 3000 fps (most sites say it’s a good rule of thumb), it would be statistically impossible for him to catch it should he be at Mach 13 or below
The travel of the ocean was him saying that he was slower then his faux 100% in this scene by a significant margin, and that he would not arrive in time for the fight, and in a moment that explained to us the audience, why he wasn’t showing up and the stakes of the people at UA being alone.
That's not what he brought up. He finds it inconsistent, and not well substantiated that it's being asserting they are able to fight/react/move at sub-relativistic speeds.
Again, it’s only fight and react, not move, we’d also apply this to several other verses, and with Shigaraki himself fighting S&S, who at the moment can seemingly react to military lasers (which are photon in nature), it applies more to the sub relativistic qualities
Sure, but do you accept or understand, that if we suggest Nagant's bullets genuinely are sub-relativistic, and Deku outpaced (not only reacted) them, he'd have a travel and movement speed above said bullet?
That would only apply to the tier of Faux 100% and Prime AM, he powered up to fight Shigaraki, his hair spiking back and the OFA aura we know popping up, signifying he was not at full power when he was traveling, Which makes sense for his character
And look at what I said above in the first faux 100% usage