Condition Yoke is one of three material conditions on a US Navy warship, material conditions are set depending on the current situation to help contain potential damage. Condition X-Ray is the lowest and most common condition, it is set when the ship is in almost no danger of attack or natural hazards; all doors marked with X should be closed when not in use. Condition Yoke is set when a ship is entering or leaving port, when in rough seas or entering a possible combat zone; during condition Yoke all doors marked with an X or Y should remain closed when not in use. Condition Zebra is the highest and most serious material condition, it is set during general quarters (battle stations), in the event of a on-board contagion, when entering and leaving port during wartime, or anytime the ship is in danger against fire, flooding and other damage; all doors marked with X, Y or Z should remain closed at all times.
The support analyst told Ray that Jason was not present because "Op falls under S.A.". SA is short for Sensitive Activities and is defined as Operations, actions, activities, or programs that, if compromised, could have enduring adverse effects on U.S. foreign policy, DOD (Department of Defense) activities, or military operations or cause significant embarrassment to the U.S., its allies, or the DOD. These are generally handled through special access, compartmented, or other sensitive control mechanisms. In other words, his clearance rating is not high enough to be read into the program.
THREATCON is short for THREAT CONdition