MILITARY TIME

THE 24 HOUR CLOCKTHE 24 HOUR CLOCK

THE TWENTY-FOUR-HOUR CLOCK

THE MILITARY SERVICES AND CIVILIANS USE DIFFERENT METHODS OF EXPRESSING TIME. ALL CADETS

SHOULD LEARN THIS METHOD, CALLED MILITARY TIME OR THE

TWENTY-FOUR-HOUR CLOCK.

HOW WE EXPRESS TIME

IN CIVILIAN LIFE, WE CONVEY TIME IN CIVILIAN LIFE, WE CONVEY TIME TO ONE ANOTHER BY USING:TO ONE ANOTHER BY USING:

A.M.A.M.OROR

P.M.P.M.

WHEN WE SAY OR WRITE 8 A.M., WE MEAN..

EIGHT O’CLOCK IN EIGHT O’CLOCK IN THE MORNINGTHE MORNING

WE WRITE THIS AS..WE WRITE THIS AS..

8 A.M.8 A.M.

“A.M.” MEANS..

ANTE MERIDIEMANTE MERIDIEMOROR

BEFORE NOONBEFORE NOON(Or before the middle of the day)(Or before the middle of the day)

WHEN WE SAY OR WRITE 8 P.M., WE MEAN..

EIGHT O’ CLOCK AT EIGHT O’ CLOCK AT NIGHTNIGHT

WE WRITE THIS AS..WE WRITE THIS AS..

8 P.M.8 P.M.

PM MEANS..

POST MERIDIEMPOST MERIDIEMOROR

AFTER NOONAFTER NOON(Or after the middle of the day)(Or after the middle of the day)

TO GIVE THE EXACT TIMES

WE ATTACH THE MINUTES AFTER WE ATTACH THE MINUTES AFTER THE HOUR, SUCH AS..THE HOUR, SUCH AS..

8:45 A.M. WHICH MEANS:8:45 A.M. WHICH MEANS:

45 MINUTES AFTER 45 MINUTES AFTER EIGHT O’CLOCK IN EIGHT O’CLOCK IN THE MORNING, OR..THE MORNING, OR..

8:45 P.M.

WHICH MEANS:WHICH MEANS:

45 MINUTES 45 MINUTES AFTER EIGHT AFTER EIGHT O’CLOCK AT O’CLOCK AT

NIGHTNIGHT

WE GIVE SPECIAL NAMES TO 12 A.M. AND 12 P.M.

WE CALL 12 A.M.WE CALL 12 A.M.

MIDNIGHTMIDNIGHT AND WE CALL 12 P.M.AND WE CALL 12 P.M.

NOONNOON

THIS SYSTEM WORKS FINE IN CIVILIAN LIFE

IN THE MILITARY, SUCH A SYSTEM IN THE MILITARY, SUCH A SYSTEM WOULD BE CONFUSING AND CAUSE WOULD BE CONFUSING AND CAUSE

MANY PROBLEMS.MANY PROBLEMS.

THE MILITARY WORKS ALL OVER THE THE MILITARY WORKS ALL OVER THE WORLD, IN MANY DIFFERENT TIME WORLD, IN MANY DIFFERENT TIME

ZONES.ZONES.

WE CAN NOT WE CAN NOT AFFORD MISTAKES AFFORD MISTAKES

IN IN COMMUNICATING COMMUNICATING THE THE CORRECT CORRECT

TIME.TIME.

NAVY COMMUNICATIONS ARE BY MESSAGE OR

RADIOTIMES SENT BY THIS METHOD COULD TIMES SENT BY THIS METHOD COULD

BE GARBLED OR HAVE STATIC BE GARBLED OR HAVE STATIC INTERFERENCE OR NOT BE INTERFERENCE OR NOT BE

UNDERSTOOD BECAUSE OF BATTLE UNDERSTOOD BECAUSE OF BATTLE NOISES.NOISES.

NAVY COMMUNICATIONS ARE BY MESSAGE OR

RADIO TYPED AND WRITTEN MESSAGES TYPED AND WRITTEN MESSAGES

CAN ALSO HAVE COMMON CAN ALSO HAVE COMMON MISTAKES IN TIME.MISTAKES IN TIME.

RESULTS!

BATTLES AND LIVES COULD BE LOST BATTLES AND LIVES COULD BE LOST BECAUSE AN IMPORTANT EVENT BECAUSE AN IMPORTANT EVENT

WAS NOT ON TIME!WAS NOT ON TIME!

TIME IS ALSO ESSENTIAL TO NAVIGATION

THE SHIP’S NAVIGATOR MUST KEEP THE SHIP’S NAVIGATOR MUST KEEP ACCURATE TIME TO FIX THE SHIP’S ACCURATE TIME TO FIX THE SHIP’S POSITION.POSITION.

WATCH AND LOG ENTRIES

ALMOST EVERY RECORD OF ANY ALMOST EVERY RECORD OF ANY TYPE ON A SHIP IS RECORDED WITH TYPE ON A SHIP IS RECORDED WITH ACCURATE TIMES, 24 HOURS A DAY.ACCURATE TIMES, 24 HOURS A DAY.

MILITARY TIME

THE MILITARY MUST THE MILITARY MUST HAVE A SYSTEM HAVE A SYSTEM

THAT CAN NOT BE THAT CAN NOT BE MISUNDERSTOOD!!MISUNDERSTOOD!!

THIS MEANS THIS MEANS HAVING AN HAVING AN

EXACT TIME FOR EXACT TIME FOR EVERY HOUR EVERY HOUR

AND MINUTE OF AND MINUTE OF THE DAY.THE DAY.

EXPLAINING THE 24-HOUR-CLOCK

IN THE MILITARY TIME SYSTEM, WE IN THE MILITARY TIME SYSTEM, WE DO AWAY WITH :DO AWAY WITH :

A.M.A.M.AND AND

P.M.P.M.

YOU WILL RECOGNIZE DAY OR NIGHT BY THE HOUR

ITSELF.EIGHT O’CLOCK IN THE MORNING CAN EIGHT O’CLOCK IN THE MORNING CAN

NOT BE CONFUSED WITH EIGHT NOT BE CONFUSED WITH EIGHT O’CLOCK AT NIGHT!O’CLOCK AT NIGHT!

WE ALSO ELIMINATE USING THE WE ALSO ELIMINATE USING THE EXPRESSION “O’CLOCK.”EXPRESSION “O’CLOCK.”

HOW IT WORKS!

EACH HOUR AND EACH MINUTE OF EACH HOUR AND EACH MINUTE OF THE DAY HAS ITS OWN NUMBER.THE DAY HAS ITS OWN NUMBER.

EACH DAY STARTS AT A FRACTION EACH DAY STARTS AT A FRACTION OF A SECOND AFTER MIDNIGHT. OF A SECOND AFTER MIDNIGHT.

THIS TIME IS CALLED :THIS TIME IS CALLED :

00000000

ONE O’ CLOCK IN THE MORNING IS ONE O’ CLOCK IN THE MORNING IS

0100,0100,

PRONOUNCED PRONOUNCED

ZERO ONE HUNDRED.ZERO ONE HUNDRED.

TWO O’CLOCK IN THE MORNING IS TWO O’CLOCK IN THE MORNING IS

0200,0200,

PRONOUNCEDPRONOUNCED

ZERO TWO HUNDRED ZERO TWO HUNDRED

THE MORNING HOURS CONTINUE AS FOLLOWS:

3 O’CLOCK 0300 ZERO THREE HUNDRED 3 O’CLOCK 0300 ZERO THREE HUNDRED

4 O’CLOCK 0400 ZERO FOUR HUNDRED4 O’CLOCK 0400 ZERO FOUR HUNDRED

5 O’CLOCK 0500 ZERO FIVE HUNDRED5 O’CLOCK 0500 ZERO FIVE HUNDRED

AND SO ON UNTIL TEN O’CLOCK IN THE AND SO ON UNTIL TEN O’CLOCK IN THE MORNING , WHICH IS 1000.MORNING , WHICH IS 1000.

PRONOUNCED TEN HUNDRED.PRONOUNCED TEN HUNDRED.

ELEVEN O’CLOCK IS 1100 OR ELEVEN O’CLOCK IS 1100 OR

ELEVEN HUNDREDELEVEN HUNDRED

AND NOON IS AND NOON IS

12001200

PRONOUNCED TWELVE PRONOUNCED TWELVE HUNDRED.HUNDRED.

THE AFTERNOON HOURS

THE HOUR FOLLOWING 1200 OR NOON THE HOUR FOLLOWING 1200 OR NOON IS:IS:

13001300IN CIVILIAN TIME THAT WAS 1:00 PM IN CIVILIAN TIME THAT WAS 1:00 PM

IN MILITARY TIME IT IS IN MILITARY TIME IT IS

THIRTEEN HUNDREDTHIRTEEN HUNDRED

AFTERNOON TIMES CONTINUE:

2 PM - 1400 OR FOURTEEN HUNDRED2 PM - 1400 OR FOURTEEN HUNDRED

3 PM - 1500 OR FIFTEEN HUNDRED3 PM - 1500 OR FIFTEEN HUNDRED

4 PM - 1600 OR SIXTEEN HUNDRED4 PM - 1600 OR SIXTEEN HUNDRED

5 PM - 1700 OR SEVENTEEN HUNDRED5 PM - 1700 OR SEVENTEEN HUNDRED

THIS SEQUENCE CONTINUES UNTIL THIS SEQUENCE CONTINUES UNTIL ELEVEN O’CLOCK AT NIGHT WHICH IS :ELEVEN O’CLOCK AT NIGHT WHICH IS :

23002300

THE DAY ENDS AT MIDNIGHT

WHICH THE MILITARY CALLS:WHICH THE MILITARY CALLS:

24002400OROR

00000000THE CLOCK TURNS OVER AT 2400 AND THE CLOCK TURNS OVER AT 2400 AND

BECOMES 0000BECOMES 0000

HOURS ON THE MILITARY CLOCK

0000 OR 2400 (MIDNIGHT)0000 OR 2400 (MIDNIGHT)

0100 1 O’CLOCK IN THE MORNING0100 1 O’CLOCK IN THE MORNING

0200 2 O’CLOCK IN THE MORNING0200 2 O’CLOCK IN THE MORNING

0300 3 O’CLOCK IN THE MORNING0300 3 O’CLOCK IN THE MORNING

0400 4 O’CLOCK IN THE MORNING0400 4 O’CLOCK IN THE MORNING

0500 5 O’CLOCK IN THE MORNING0500 5 O’CLOCK IN THE MORNING

0600 6 O’CLOCK IN THE MORNING0600 6 O’CLOCK IN THE MORNING

0700 7 O’CLOCK IN THE MORNING0700 7 O’CLOCK IN THE MORNING

0800 8 O’CLOCK IN THE MORNING0800 8 O’CLOCK IN THE MORNING

0900 9 O’CLOCK IN THE MORNING0900 9 O’CLOCK IN THE MORNING

1000 10 O’CLOCK IN THE MORNING1000 10 O’CLOCK IN THE MORNING

1100 11 O’CLOCK IN THE MORNING1100 11 O’CLOCK IN THE MORNING

1200 12 O’CLOCK NOON1200 12 O’CLOCK NOON

1300 1 O’CLOCK IN THE AFTERNOON1300 1 O’CLOCK IN THE AFTERNOON

1400 2 O’CLOCK IN THE AFTERNOON1400 2 O’CLOCK IN THE AFTERNOON

1500 3 O’CLOCK IN THE AFTERNOON1500 3 O’CLOCK IN THE AFTERNOON

1600 4 O’CLOCK IN THE AFTERNOON1600 4 O’CLOCK IN THE AFTERNOON

1700 5 O’CLOCK IN THE AFTERNOON1700 5 O’CLOCK IN THE AFTERNOON

1800 6 O’CLOCK IN THE EVENING1800 6 O’CLOCK IN THE EVENING

1900 7 O’CLOCK IN THE EVENING1900 7 O’CLOCK IN THE EVENING

2000 8 O’CLOCK IN THE EVENING2000 8 O’CLOCK IN THE EVENING

2100 9 O’CLOCK IN THE EVENING2100 9 O’CLOCK IN THE EVENING

2200 10 O’CLOCK IN THE EVENING2200 10 O’CLOCK IN THE EVENING

2300 11 O’CLOCK IN THE EVENING2300 11 O’CLOCK IN THE EVENING

PUTTING THE MINUTES INTO THE TIME

MINUTES ARE USED THE SAME MINUTES ARE USED THE SAME WAY AS THEY WERE WITH WAY AS THEY WERE WITH

CIVILIAN TIME:CIVILIAN TIME:

45 MINUTES AFTER EIGHT IN THE 45 MINUTES AFTER EIGHT IN THE MORNING WOULD BE:MORNING WOULD BE:

08450845

10 MINUTES AFTER ELEVEN IN THE MORNING 10 MINUTES AFTER ELEVEN IN THE MORNING

WOULD READ:WOULD READ:

11101110

30 MINUTES AFTER ONE IN THE AFTERNOON 30 MINUTES AFTER ONE IN THE AFTERNOON WOULD READ:WOULD READ:

13301330

10 MINUTES BEFORE MIDNIGHT WOULD 10 MINUTES BEFORE MIDNIGHT WOULD READ:READ:

23502350

FIRST MINUTES OF THE DAY

REMEMBER - MIDNIGHT IS 2400 OR REMEMBER - MIDNIGHT IS 2400 OR 00000000

ONE MINUTE AFTER MIDNIGHT ISONE MINUTE AFTER MIDNIGHT IS

00010001

TEN MINUTES AFTER MIDNIGHT IS TEN MINUTES AFTER MIDNIGHT IS 00100010

A HINT FOR REMEMBERING MILITARY TIME

AFTERNOON TIMES CAN BE AFTERNOON TIMES CAN BE CONVERTED BY ADDING 12CONVERTED BY ADDING 12

EXAMPLEEXAMPLE

3:15 P.M.3:15 P.M.

ADD 3:15 + 12= 1515ADD 3:15 + 12= 1515

TIMES BEFORE NOON ARE JUST AS THEY APPEAR

7:OO A.M. BECOMES7:OO A.M. BECOMES

070007008:25 A.M. BECOMES8:25 A.M. BECOMES

08250825

INSTANT REVIEW

CONVERT THE FOLLOWING CIVILIAN CONVERT THE FOLLOWING CIVILIAN TIMES INTO MILITARY TIMES:TIMES INTO MILITARY TIMES:

30 MINUTES AFTER SEVEN IN THE 30 MINUTES AFTER SEVEN IN THE MORNING:MORNING:

ANSWER:ANSWER:

07300730

2:05 IN THE AFTERNOON2:05 IN THE AFTERNOON

ANSWER:ANSWER:

140514059:20 AT NIGHT9:20 AT NIGHT

ANSWER:ANSWER:

21202120

0NE MINUTE BEFORE MIDNIGHT0NE MINUTE BEFORE MIDNIGHT

ANSWER:ANSWER:

23592359ONE MINUTE AFTER MIDNIGHTONE MINUTE AFTER MIDNIGHT

ANSWER:ANSWER:

00010001

ONE O’CLOCK IN THE MORNING?ONE O’CLOCK IN THE MORNING?

ANSWER:ANSWER:

01000100

HOW IS THIS PRONOUNCED?HOW IS THIS PRONOUNCED?

ANSWER:ANSWER:

ZERO ONE HUNDREDZERO ONE HUNDRED

WHICH OF THE FOLLOWING IS WHICH OF THE FOLLOWING IS INCORRECT?INCORRECT?

1301 1501 1601 24011301 1501 1601 2401

ANSWER:ANSWER:

24012401

At 2400 the day ends.At 2400 the day ends.

WHAT IS AN EASY WAY TO CONVERT WHAT IS AN EASY WAY TO CONVERT CIVILIAN TIMES IN THE AFTERNOON TO CIVILIAN TIMES IN THE AFTERNOON TO

MILITARY TIME?MILITARY TIME?

ANSWER:ANSWER:

ADD 12 TO THE TIME;ADD 12 TO THE TIME;

EXAMPLE:EXAMPLE:

4:05 P.M. + 12 = 16054:05 P.M. + 12 = 1605

THIS ENDS THIS PRESENTATION