Definition
An informal name for the traditional arrangement of six primary flight instruments on an analog instrument panel: the airspeed indicator, attitude indicator, and altimeter on the top row, with the turn coordinator, heading indicator, and vertical speed indicator on the bottom row.
Plain English
The classic six round dials grouped together on older airplane panels that show the pilot the basic information needed to fly: how fast, which way the nose is pointing up or down or banked, how high, whether you are turning, what direction you are heading, and whether you are climbing or descending.
Context Anchor
Seen when comparing traditional round-gauge instrument panels with electronic flight displays or glass cockpits.
Derivation
The nickname comes from the way the six round gauges sit together in two rows of three, which looks like a six-pack of bottles or cans in a carton. The visual likeness is the whole reason the term stuck.
Why Pilots Care
These six instruments provide the minimum set of attitude and performance data needed for safe instrument flight when outside visual references are lost.
Intuition Check
Do not read six pack as a package of drinks here. In this aviation context, it means the six main flight instruments grouped together on the panel.
Example Sentence 1
The training aircraft still has a traditional six pack, so we practiced our instrument scan on real round gauges before moving to the glass cockpit.
Example Sentence 2
In the EFD chapter the handbook contrasts glass cockpits with the older six pack layout.