Plan of Intended Movement (PIM)
Prior to any ship getting under way, a PIM must be formed. Normally,
the senior Quartermaster and the navigator will discuss the best possible
routes for the ship to follow. Messages are then sent to group
commanders and the ship gets under way. As the QMOW, you will be
tasked with tracking the ships progress.
Tracking is directly related to time, speed, and distance calculation.
Figure 8-6 represents a ships track with PIM times and dates annotated.
As a rule, PIM is laid out for every 4 hours GMT. When referring to
the ships position in relation to PIM, you should express any values as
time ahead or behind PIM. Lets look at an example.
Figure 8-6. Example PIM calculation.