737 Flight Crew Operations Manual
Flight Management, Navigation -
Controls and Indicators
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D6-27370-866-EGP 11.10.15
PPOS –
• left window displays present latitude
• right window displays present longitude.
WIND –
• left window displays present inflight true wind direction
• right window displays present inflight wind speed (knots).
HDG/STS –
• left window displays present true heading
• right window displays any applicable maintenance status codes
• during alignment, right window displays minutes remaining until
alignment is complete. For alignments greater than 15 minutes, the
window displays 15 until the time remaining reaches 14 minutes. The
display then counts down in one minute intervals.
2 Brightness (BRT) Control
Rotate – adjusts brightness of the data displays.
3 System Display (SYS DSPL) Selector
L – selects left IRS for the data displays.
R – selects right IRS for the data displays.
4 Enter (ENT) Key
Illuminated (white) – N, S, E, W, or H entries are being keyed.
Push – keyed data is entered into IRS following completion of valid self–test for
reasonableness.
5 Data Displays
Two windows display data for the IRS selected with the system display selector
• type of data displayed is normally determined by the display selector
• keyboard entry of present position or magnetic heading overrides the
selected display
• last digit of each window is for a decimal place (tenths).
September 15, 2016
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