MIL-G-21410 Revision A, December 23, 1991
GOVERNING SYSTEMS, SPEED & LOAD-SENSING NAVAL SHIPBOARD USE
This specification covers the performance and test requirements for speed-governing systems which sense speed and load and permit parallel operation of alternating current generator sets.
Speed governing systems are of the following types, as specified (see 6.2):
Type DE - For diesel generator sets.
Type ST - For steam turbine generator sets.
Type GT - For single-shaft gas turbine generator sets.