FUNCTION SELECTOR SWITCH (four-position)

DATE - the day and month are shown in the top 4-digit area of the clock face

• the two left digits identify the month and the two right digits identify the day and the year
• as the day and year occupy the same area, the display alternates each second between the two parameters
• to aid interpretation while displaying the year, the left digits are blank
• leap years are programmed into clock operation

LOC - local time is shown in the same location as Greenwich Mean Time (GMT)

• a single dot appears above the LOC legend, to give an alternative means of distinguishing local time from GMT, in addition to switch position

GMT - Greenwich Mean Time is shown in the top 4-digit readout area of the clock face from 00:00 to 23:59 minutes

• a single dot is displayed above the GMT legend

CHRONOMETER FUNCTION SWITCH (momentary action)

PUSH - (when not in set mode) supplies the three states, in order, that follows: First activation: START • temporary removal of the elapsed time • time hour display • return to zero • chronometer minute count start • chronometer sweep hand start Second activation: STOP • maintains the display of the current indication Third activation: RESET • sweep hand returns to zero • elapsed time display returns

ELAPSED TIME SWITCH (momentary action)

• gives 3-state and 2-state sequences dependent on the Weight On Wheels (WOW) status of the aeroplane: On the ground: • first activation: Display of Elapsed Time • second Activation: Elapsed Time is reset to zero • third activation: Display of Chronometer minutes In the air: • first Activation: Display of Elapsed Time • second Activation: Display of Chronometer minutes
• Elapsed Time (ET) is indicated from 0 to 99:59 in the lower digital display area of the clock face and gives an indication of aeroplane flight time
• the mode is automatically enabled when the aeroplane becomes airborne and can only be reset on the ground