Paul GrahamVerified account

Makes me wonder how big the navigational data for the nuclear variant was sure its just a list of gimble angles and timeings so the missile reaches the target and i wonder how it compares to the IIC rocket variant data size given it just had to reach altitude and angle

Original Titan II used "delta guidance"; the trajectory was pre-computed on the ground and the simple onboard computer used polynomial corrections to stay on course. The IIIC rocket used "explicit guidance", computing the trajectory itself. See footnote 1 in my post for details.

Im curious about the size difference in the instructions though both compared to the max size of 48k and to each other is the difference only 1-3k or a few bytes

I'm not sure I understand the question. The ASC-15 (old Titan computer) had 9-bit instructions and 27-bit words, and ~12KB of magnetic drum storage. This newer Titan computer has (probably) 12-bit instructions and 24-bit words.