Amphibious assault - rules assistance

[Odonis]

Hey - quick rule check:

I (stupidly) forgot about the kamikaze allowance when attacking Philippines, and as the US brought a SS + DD + loaded transport to attack a lonely Japanese SS in SZ 35 and to take the unoccupied, but Japanese owned, PH Island.

My opponent decided to use 2 Kamikaze shots at my DD and sunk it. Now during Combat phase, he submerged his SS before combat.

Question: does this foil my amphibious assault even if he submerges?

[Krieghund]

No, it doesn’t.  When he submerged, you won the sea battle.

[Odonis]

Thanks!