Page 64, Step 4, Hours in Jump Space (clarification and addition): The formula given for normal jumpspace exit is: 124 hrs + (2D×6 hrs), yielding a result of from 136 - 196 hours (5.7 to 8.2 days). However, this does not account for military operations when vessels know they have to arrive in unison. Such vessels spend significantly longer at the start computing and sharing jump vector computations. This leads to a much more accurate jump exit at the other end, with the error dropping significantly
If double the jump preparation time is spent with all the affected ships in computer link via communication lines, use the following formula instead: 167 hrs + (2D×0.1 hr), yielding a result of from 167.2 - 168.2 hours. Most ships will arrive within minutes of each other, with the worst spread being up to an hour apart. Constant communication during the jump vector generate is essential for this to work, and double the normal jump vector generation time must be observed. But when getting there "on a dime" timewise is essential, then this technique is the key. Most civilian vessels don't bother.