How to have missiles on ships and vehicles aim at 180 degrees automatically.

There are two ways to get this to happen. One, is to make the missile a gun in the toolkit. In the missile's main editing window, change it's TYPE to Gun, and then in the Ordnance Info menu check "Object is a Gun". Because missiles are not slewed in Fighters Anthology, but guns are, the ship or vehicle will slew now the weapon. Another way is to keep it tagged a missile, but edit a line in the .JT file toward the bottom. This line controls the horizontal field of view (FOV) for the missile when loaded on vehicles and ships. Here's an example excerpt from the .JT file:

"byte 31 <-------- AI vehicle horizontal FOV (change to 180 for all aspect firing)
word 1400
word 1668
word 0
word 120
word 260
word 5460
word 2730
byte 100
byte 100

============ Section removed to save space =============
word 0
word 750
word 35

;---------------- END OF PROJ_TYPE ----------------

:ot_names
string "SA-3"
string "SA-3 Goa"
string "SA3.JT"
:shape
string "goa.SH"
:loopSound
string "&salmis.11k"
:si_names
string "SA-3"
string "SA-3 Goa"
string "SA3.JT"
:fireSound
string "&saltmis.11k"
end"