Abbreviations

EM/GtG - Grease the Gears, formerly known as Expert Marksman
PM - Preventive Maintenance
GF/EL - Gun Feeder, formerly known as Expert Loader
IFA - Incoming Fire Alert
ERS - Emergency Repair Specialist
FFT - Focus Fire Training
HAP/SHAP - (Super)Heavy AP shells, different names depending on ship type.
HHE/HSAP - Heavy HE/SAP shells
PT - Priority Target
LS - Last Stand
BFT - Main Battery and AA Specialist, formerly known as Basic Firing Training
AFT - Main Battery and AA Expert for DDs and Long-Range Secondary Battery for BBs, formerly known as Advanced Firing Training
TAE - Fill the Tubes, formerly known as Torpedo Armament Expert
PaP - Pack a Punch
AR - Adrenaline Rush
IFHE - Inertia Fuse for High Explosive shells
SE - Survivability Expert
SI - Superintendent
BoS - Basics of Survivability
IRPR - Improved Repair Party Readiness
SiS - Swift in Silence
RPF - Radio Location, formerly known as Radio Position Finding
FB - Fearless Brawler
CE - Concealment Expert
TGG - Top Grade Gunner
CQC - Close Quarters Combat
MS - Improved Secondary Battery Aiming, formerly known as Manual Secondaries
FP - Fire Prevention
ERE - Emergency Repair Expert
LG - Last Gasp
IEB - Improved Engine Boost
ET - Engine Technician
AS - Air Supremacy
IE - Improved Engines
TB - Torpedo Bomber
RS - Repair Specialist
SS - Sight Stabilization
AA - Aircraft Armor
BFC - Bomber Flight Control
PF - Proximity Fuse
EAA - Enhanced Aircraft Armor