concerning the 2nd question you propose:
If you keep a constant hdg of 090° means you're tracking a rhumb line and necessarily also a constant Latitude.
You need to use the departure formula which is:
Dep=ch long(in minutes ')*cos Lat.
1200nm=ch long(') * cos 32°
1200nm=ch long(')* 0.848
ch long(')=1200/0.848
=1415.1'
=23.58°
=23° 35' further east
new position: N32° (unchanged), E43° 35'
remember, the distance between two meridians spaced 1° is 60nm only at the equator, and 0nm at the poles. At 30°N is 60*cos30°=51.96nm , at 70°N is 20.5nm and so on.
ciao