proportional navigation guidance

proportional-integral-derivative (PID)

proportional–integral–derivative controller (PID controller / three-term controller)

proton recoil proportional counter (tube)

proportional–integral–derivative (PID) controller

Proportional

position and navigation unit / position navigation unit (PNU)

constant-bearing guidance / homing / navigation

circular navigation guidance

radio navigation guidance

constant-bearing guidance (navigation)

aerial navigation

aid to navigation (ATON)

communication and navigation aids (COMNAV)

Global Navigation Satellite System (GLONASS)

Global Navigation Satellite System (GNSS)

inertial navigation and attack system (INAS)

inertial navigation system (INS)

land navigation

maritime navigation

navigation

navigation aids (NAVAIDS)

navigation bridge

navigation department

navigation head

navigation radar

navigation rights

navigation satellite

NAVigation Satellites providing Time And Range (NAVSTAR)

navigation skills

navigation(al) equipment

navigational aid (NAVAIDs); aid to navigation (ATON)

piloting and navigation system