I'm just syrf'n USA and seen allot here in ships.
Most WWII era US Navy surface warships had 600psi superheated plants with
M type separately controlled superheater boilers. Drum pressure and
steam temperature were controlled by different sets of burners.
Most 1948-1970 era US Navy warships had 1275psi superheated plants with
D type uncontrolled superheater boilers. Steam temperature was a function
of firing rate and was around 975 F maximum.
Most US Navy nuclear submarines and surface warships have saturated
secondary loop steam systems.