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Navigation and timekeeping

Alarm clock
Type of clock
April
Fourth month in the Julian and Gregorian calendars
Atomic clock
Extremely accurate reference clock used as standard for timekeeping
August
Eighth month in the Julian and Gregorian calendars
Backstaff
Navigational instrument
BeiDou
Chinese satellite navigation system
Calendar
System for organizing the days of year
Cardinal direction
Directions of north, east, south and west
Celestial navigation
Navigation using astronomical objects to determine position
Chinese calendar
Lunisolar calendar from China
Chronometry
Art or science of measuring time
CLOCK
Protein-coding gene in the species Homo sapiens
Clock Face, St Helens
Village in England
COMPASS
Acronym for COMPrehensive ASSembler; any of a family of macro assembly languages on Control Data Corporation's 3000 series, and on the 60-bit CDC 6000 series, 7600 and Cyber 70 and 170 series mainframe computers
Daylight saving time
Seasonal change of clock settings
Dead reckoning
Process of calculating one's current position by using a previously determined position
December
Twelfth month in the Julian and Gregorian calendars
Digital clock
Type of clock that displays the time with numbers
Experimental Advanced Superconducting Tokamak
Experimental tokamak
F.C. Copenhagen
Professional football club in Copenhagen, Denmark
February
Second month in the Julian and Gregorian calendars
Friday
Day of the week
Galileo (satellite navigation)
Global navigation satellite system
Global Positioning System
United States satellite navigation system
GLONASS
Russian satellite navigation system
Gregorian calendar
Internationally accepted civil calendar
Gyroscope
Device for measuring or maintaining orientation and direction
Hebrew calendar
Lunisolar calendar used for Jewish religious observances
Hourglass
Device using the flow of a substance to measure time
Islamic calendar
Lunar calendar used by Muslims to determine religious observances
Jacob's staff
Calibrated wooden rod with sliding crosspiece used for measuring the altitude of celestial bodies or the height of distant objects
January
First month in the Julian and Gregorian calendars
Julian calendar
Calendar introduced by Julius Caesar
July
Seventh month in the Julian and Gregorian calendars
June
Sixth month in the Julian and Gregorian calendars
Leap year
Calendar year containing an additional day
Lunar calendar
Type of calendar
Lunisolar calendar
Lunar calendar
March
Third month in the Julian and Gregorian calendars
May
Fifth month in the Julian and Gregorian calendars
Monday
Day of the week
Names of the days of the week
List article
Navigation (journal)
Academic journal
November
Eleventh month in the Julian and Gregorian calendars
Octant (instrument)
Measuring instrument used primarily in navigation; type of reflecting instrument
October
Tenth month in the Julian and Gregorian calendars
Pendulum
Mechanism for regulating the speed of clocks
Pendulum clock
Clock regulated by a pendulum
Pocket watch
Timepiece designed to be carried in the user's pocket
Quadrant (instrument)
Navigation instrument
Quartz clock
Clock type
Radar
Object detection system using radio waves
Satellite navigation
Use of satellite signals for geo-spatial positioning
Satellite navigation device
Device that determines its position by analyzing GPS satellite signals
Saturday
Day of the week
September
Ninth month in the Julian and Gregorian calendars
Sextant
Tool for angle measurement
Solar calendar
Type of calendar
Sonar
Technique that uses sound propagation
South
One of the four cardinal directions
Stopwatch
Handheld timepiece designed to measure an amount time
Sunday
Day of the week
Sundial
Device that tells the time of day by the apparent position of the Sun in the sky
Thursday
Day of the week
Time zone
Area that observes a uniform standard time
Tuesday
Day of the week
Watch
Personal timepiece
Water clock
Time piece in which time is measured by the flow of liquid into or out of a vessel
Wednesday
Day of the week
West
One of the four cardinal directions