Tindallgrams

Terms & Abbreviations: P

P11

Earth Orbit Insertion (EOI) Monitor, a program in the command module computer.

P64

LGC Approach Phase program.

P65

LGC Landing Phase (Auto).

P66

LGC Landing Phase (ROD) program.

P67

LGC Landing Phase (Manual) program.

PCR

Program Change Request.

Perigee

The point in an Earth orbit where the orbiting object is closest to the Earth's center.

PGNCS

Primary Guidance, Navigation and Control System (pronounced “pings”). The inertial guidance system in both the Command Module and the Lunar Module.