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] ]
<!-- Image with unknown copyright status removed: ] --> <!-- Image with unknown copyright status removed: ] -->
The '''Casio F-91W''' is an inexpensive quartz ], manufactured by the Japanese firm ]. It has a 1/100 second ] with a capacity of up to 59' 59.99" and measuring modes of net time, split time, and 1st-2nd place times. There are the options of an hourly time "beep" and a daily alarm. It has an automatic calendar, although adjustment for leap-years is not supported as the watch does not record the year. The '''Casio F91W''' is an inexpensive quartz ], manufactured by the Japanese firm ]. It was introduced in 1991. This watch is widely available throughout the world in various packaging.


==Specifications==
The manufacturers say the watch is accurate to +/-30 seconds per month. It uses a CR2016 lithium battery, with a claimed battery life of approximately seven years (assuming 20 secs of alarm and 1 sec of light usage per day). The watch case measures 37.5 x 33.5 x 9.5&nbsp;mm and weighs 20g. The manufacturer's module number for this model (stamped on the stainless steel rear of the watch case) is 593. The watch front is marked'WATER RESIST', but this means 'splashproof' only, and it cannot be used when showering or swimming/snorkeling.
The F91W has a 1/100 second ] with a capacity of up to 59' 59.99" and measuring modes of net time, split time, and 1st-2nd place times. There are the options of an hourly time "beep" and a daily alarm. It has an automatic calendar, although adjustment for leap-years is not supported as the watch does not record the year.


The manufacturers say the watch is accurate to ±30 seconds per month. It uses a CR2016 lithium battery, with a claimed battery life of approximately seven years (assuming 20 seconds of alarm and 1 second of light usage per day). The watch case measures 37.5&nbsp;x&nbsp;33.5&nbsp;x&nbsp;9.5&nbsp;mm and weighs 20 g. The manufacturer's module number for this model (stamped on the stainless steel rear of the watch case) is 593. The watch front is marked 'WATER RESIST', but this means 'splashproof' only, and it cannot be used when showering or swimming/snorkeling.
Since the watch was introduced it has only been updated once. The change was to the ] (for example Casio A-168W) which went from the standard light in older watches to the blue-green electro-luminescent backlight seen in many of today's watches.


The watch is controlled by three push-buttons. The upper left button turns on the backlight, cancels the alarm, and is used for selecting settings. The lower left button cycles the modes of the watch: → Alarm → Stopwatch → Time adjustment and back to the normal time display. The button on the right is the function button: when used after pressing the lower left mode button it starts and stops the stopwatch, or changes the settings currently being adjusted; but when pressed alone switches between the 12 and 24 hour modes. Since the watch was introduced in 1991 it has only been updated once. The change was to the ] (for example Casio A-168W) which went from the standard light in older watches to the blue-green electro-luminescent backlight seen in many of today's watches.
==Operation==
The watch is controlled by three side push-buttons. The upper left button turns on the backlight, cancels the alarm, and is used for selecting settings. The lower left button cycles the modes of the watch: → Alarm → Stopwatch → Time adjustment and back to the normal time display. The button on the right is the function button: when used after pressing the lower left mode button it starts and stops the stopwatch, or changes the settings currently being adjusted; but when pressed alone switches between the 12 and 24 hour modes.


The time or date is adjusted by pressing the lower left button three times to bring the watch to time adjustment mode. This causes the seconds to flash on the display. The top left button is pressed to cycle through seconds, hours, minutes, month, date, day, and normal mode. The right button is then pressed to adjust the flashing value displayed. When the adjustments are finished, the bottom left button is pressed repeatedly until the watch returns to normal mode. The time or date is adjusted by pressing the lower left button three times to bring the watch to time adjustment mode. This causes the seconds to flash on the display. The top left button is pressed to cycle through seconds, hours, minutes, month, date, day, and normal mode. The right button is then pressed to adjust the flashing value displayed. When the adjustments are finished, the bottom left button is pressed repeatedly until the watch returns to normal mode.
Line 13: Line 17:
The watch's display shows the day of the week, day of the month, hour, minute, seconds, and the signs for PM (or ]), alarm signal, and hourly signal (double beep on the hour). The watch's display shows the day of the week, day of the month, hour, minute, seconds, and the signs for PM (or ]), alarm signal, and hourly signal (double beep on the hour).


In stopwatch mode, minutes, seconds and one-hundredths of a second are shown. In stopwatch mode, minutes, seconds and hundredths of a second are shown.

This watch is widely available throughout the world in various packaging, popular in U.S Army including a version with a ] and strap.


==Claimed use in terrorism== ==Claimed use in terrorism==
] ] officials have identified the F91W as a watch that terrorists use when constructing ]s.<ref name=MilitaryCommissionCharges2005NovJabranAlQahtani>{{cite web

This model of watch is notable because ] ] officials have identified it as the watch that terrorists use when constructing ]s.<ref name=MotherJones060712> , '']'',
] ]</ref>
], the "millennial bomber", bought two Casio F91Ws.<ref name=Wcvb>, '']'', ] ]</ref>

According to the allegations used to justify the continued detention of one of the captives, these watches were given to some attendees at ]'s ].<ref name="SummaryOfEvidence415"> prepared for ]'s '']'' - ] ] - page 216</ref> At least four of the Guantanamo detainees found with such a watch are also listed as having been to Al Farouq.

When the ] was ] by ] justice ] to release the documents from Guantanamo detainees' ]s it became known that at least ten of the Guantanamo detainees were listed as having been wearing this model of watch when they were captured.<ref>, '']''</ref>

Although none of the captives who remained in detention when the Combatant Status Review Tribunals began in August 2004 were being held solely for possession of this watch, this is used as the main allegation against them, as this link was highlighted in the ] compiled by lawyers for two detainees. It is said that having this watch was being used as "proof" of the captives' status as ]s. Those that say otherwise point to the fact that eighteen captives known to have faced the allegation of owning this watch all faced other allegations as well. However, this 'evidence' still remains the main allegation against them.

Casio officials declined to be interviewed about the U.S. intelligence accusations.<ref name=Wcvb/> Casio did, however, issue a statement in which it said the watch ''"has no exclusive technology,"'' and asserted that ''"Casio continues to work closely with all government agencies, including the Department of Homeland Security to help limit any potential threats and deal with security concerns."''

Detainees who testified to their surprise and confusion over this allegation have described their watches, and those descriptions have not matched the description of the F91W. Their descriptions have mentioned built-in ]es and ]s -- features the F91W lacks.

==Detainees listed as having a Casio watch==
{{Fancruft|date=February 2009|section=yes}}
{{Splitsection|date=February 2009}}
{| class="wikitable"
| ] || ] ||
* The ] prepared for his second annual ] stated<ref name=ArbSummaryOfEvidenceAbdullahGulamRasoul>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_2_Factors_1-99.pdf#17
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Rasoul, Abdullah Gulam
| publisher=]
| author=]
| date=] ]
| pages=17-19
| accessdate=2007-10-23
}}</ref>:
:{|
|
:The detainee was captured with two casio watches of the model that has been used in bombings that have been linked to al Qaida and radical Islamic terrorist improvised explosive devices.
|}
|-
| ] || ] ||
* Al Edah was alleged to have been wearing a Casio 195W, "the silver version of the F91W".<ref name=CsrtAlEdah>, from ]'s '']'' - pages 22-30</ref>
* Al Edah's Personal Representative challenged the logic behind linking ownership of a popular watch to membership in a terrorist organization.
|-
| ] || ] ||
* Musaid pointed out to his Tribunal:
:{|
|
"Millions and millions of people have these types of Casio watches."<ref name=Ap060309>, '']'', ] ]</ref>''
|}
|-
| ] || ] ||
* In 2006. during his second annual Administrative Review Board, Majid Aydha Muhammad Al Qurayshi faced a new justification for continuing to detain him<ref name=Arb2SummaryOfEvidenceMajidAydhaMuhammadAlQurasyshi>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_2_Factors_200-298.pdf#57
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Al Qurayshi, Majid Aydha Muhammad
| date=] ]
| author=]
| pages=pages 57-58
| publisher=]
| accessdate=2007-12-05
}}</ref>:
:{|
|
"The detainee is on a list of detainees with a '''Casio model F-91W watch'''. This model watch has been used in bombings that have been linked to al Qaida and radical Islamic terrorist improvised explosive devices."
|}
|-
| ] || ] ||
*One of the allegations on the ] prepared for Rashed Awad Khalaf Balkhair CSR Tribunal was<ref name=CsrtSummaryOfEvidenceRashedAwadKhalafBalkhair>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/000101-000200.pdf#94
| title=Summary of Evidence for Combatant Status Review Tribunal - Balkhair, Rashed Awad Khalaf
| date=] ]
| author=]
| pages=pages 94-95
| publisher=]
| accessdate=2007-12-05
}}</ref>:
:{|
|
"Detainee was captured with a ] typically used as a timing device to initiate an ]."
|}
|-
| ] || ] ||
:{|
|
*"The detainee was in possession of a wristwatch, the type used in ] bombings linked to al Qaida and radical Islamic terrorists."''<ref name=CsrtSummaryOfEvidence443> prepared for ]'s '']'' - ] ] - page 244</ref>
|}
|-
| ] || ] ||
*One of the allegations on the ] prepared for Tariqe Shallah Hassan Al Harbi Administrative Board hearing were<ref name=ArbSummaryOfEvidenceMohammedAhmedAliAlAsadi>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/publicly_filed_CSRT_records_1089-1165.pdf#79
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Al Asadi, Mohammed Ahmed Ali
| date=] ]
| author=]
| pages=pages 79-80
| publisher=]
| accessdate=2007-12-07
}}</ref>:
:{|
|
*During capture, the detainee had in his possession a Casio F-91W Watch.
*The Casio F-91 W has been used in bombings that have been linked to al Qaida and radical Islamic terrorist improvised explosive devices.
|}
|-
| ] || ] ||
*Faced the allegation that he owned a Casio F91W during his first and second Administrative Review Board hearings.<ref name=ArbSummaryOfEvidenceFahdUmrAbdAlMajidAlSharif>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_1_Factors_000197-000294.pdf#56
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Al Sharif, Fahd Umr Abd Al Majid
| date=] ]
| pages=pages 56–59
| author=]
| publisher=]
| accessdate=2008-03-14
}}</ref><ref name=Arb2SummaryOfEvidenceFahdUmrAbdAlMajidAlSharif>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_2_Factors_299-398.pdf#30
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Al Sharif, Fahd Umr Abd Al Majid
| date=] ]
| pages=pages 30–32
| author=]
| publisher=]
| accessdate=2008-03-14
}}</ref>
|-
| ] || ] ||
* Captured wearing a Casio F91W.<ref name=CsrtSulayman>, from ]'s '']'' - pages 23-31</ref>
|-
| ] || ] ||
* Captured wearing an F91W.<ref name="fox23news.com">, '']''</ref>
|-
| ] || ] ||
* Told his Tribunal he had no idea that the watch was associated with terrorism<ref></ref><ref name=BostonGlobe>, '']'', ] ]</ref>
* Told his Tribunal that the four Muslim chaplains at Guantanamo all wore this model of watch.<ref>, '']'', ] ]</ref>
* Described the features of his watch that signal the call to prayers to a devout Muslim.<ref>, '']'', ] ]</ref>
*Told his Tribunal if he had known Casio watches were tied to terrorism:
:{|
|
"If I had known that, I would have thrown (the watch) away."<ref>, '']'', ] ]</ref>''
|}
|-
| ] || ] ||
:{|
|
*"The detainee was in possession of a watch type that has been used in bombing linked to radical terrorist improvised explosive devices."''<ref name=FactorsSaeedAhmedMohammedAbdullahSaremJarabh> of ] '']'' - page 60</ref>
|}
|-
| ] || ] ||
:{|
|
*"The detainee was captured while in possession of a Casio watch model that has been used in bombings linked to al Qaida and radical Islamic terrorist groups with improvised explosive devices."''<ref name=CsrtSummaryOfEvidencePg265> prepared for ]'s '']s'' - ] ] - page 67</ref>
|}
|-
| ] || ] ||
*One of the allegations on the ] prepared for Tariqe Shallah Hassan Al Harbi Administrative Board hearing was<ref name=ArbSummaryOfEvidenceShallahHasanAlAlawiAlHarbi>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_1_Factors_001046-001160.pdf#66
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Al Harbi, Tariq Shallah Hasan Al Alawi
| date=] ]
| author=]
| pages=pages 66-68
| publisher=]
| accessdate=2007-12-09
}}</ref>:
:{|
|
The detainee was captured with a '''Casio F91W''' watch. This model has been used in bombings that have been linked to ] and radical Islamic terrorist improvised explosive devices.
|}
|-
| ] || ] ||
*The ] prepared for his first annual Administrative Review Board<ref name=ArbSummaryOfEvidenceMuhammadHamidAlQarani>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_1_Factors_000295-000393.pdf#46
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Muhammad Hamid Al Qarani
| date=] ]
| pages=pages 46–48
| author=]
| publisher=]
| accessdate=2008-04-25
}}</ref><ref name=Arb2SummaryOfEvidenceMuhammadHamidAlQarani>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_2_Factors_399-498.pdf#42
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Al Qarani, Muhammad Hamid
| date=] ]
| pages=pages 42–44
| author=]
| publisher=]
| accessdate=2008-04-25
}}</ref>:
:{|
|
:The detainee was arrested with a specific model '''casio watch''' that is given to graduates of al Farouq.
|}
|-
| ] || ] ||
* Ownership of a Casio watch was listed as one of the factors in favor of his continued detention.<ref name=ArbFactors>, '']'' - page 101-102</ref>
|-
| ] || ] ||
* Ownership of a Casio watch was listed as one of the factors in favor of his continued detention.<ref name=ArbMesutSen>, of ] '']'' - page 1</ref>
|-
| ] || ] ||
* Told his Tribunal:
:{|
|
"If it's a crime to carry this watch? Your own military personnel also carry this watch, too, Does that mean that they're just terrorists as well?"<ref>, '']''</ref><ref name=CsrtUyar>
, from ]'s '']'' - </ref>
|}
|-
| ] || ] ||
*One of the allegations on the ] prepared for his CSR Tribunal stated<ref name=CsrtSummaryOfEvidenceRashedAwadKhalafBalkhair>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/000301-000399.pdf#94
| title=Summary of Evidence for Combatant Status Review Tribunal - Khantumani, Abd Al Nasir Mohammed Abd Al Qadir
| date=] ]
| author=]
| pages=pages 44–45
| publisher=]
| accessdate=2007-12-05
}}</ref>:
:{|
|
:The detainee was in possession of a '''Casio watch''' -- a model which has been used in bombings linked to al Qaida and radical Islamic terrorist ]s.
|}
|-
| ] || ] ||
* Ownership of a Casio watch was listed as one of the factors in favor of his continued detention.<ref name=FactorsAlQurayshi> of ] '']'' - page 65</ref>
|-
| ] || ] ||
* Told his Tribunal:
:{|
|
"All I know about the watch is that it is a Casio... I know it has a compass. When we pray we have to face Mecca"<ref>, '']'', ] ]</ref>
|}
|-
| ] || ] ||
* Told his Tribunal:
:{|
|
"I have a Casio watch due to the fact that they are inexpensive and they last a long time. I like my watch because it is durable. It had a calculator and was waterproof, and before prayers we have to wash up all the way to my elbows."<ref name=Ap060309/>
|}
|-
| ] || ] ||
* The ] prepared for Abdullah Hamid Abdalsalam Alghazawy's second annual Administrative Review Board stated<ref name=Arb2SummaryOfEvidenceAbdullahHamidAbdalsalamAlghazawy>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_2_Factors_599-699.pdf#98
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Alghazawy, Abdullah Hamid Abdalsalam
| date=] ]
| pages=pages 98–101
| author=]
| publisher=]
| accessdate=2008-03-16
}}</ref>:
{| class="wikitable" border="1"
|
*The detainee had a '''Casio F-91W watch''' in his possession at the time of apprehension.
*The type of Casio watch the detainee had in his possession at the time of apprehension has been used in bombing that have been linked to al Qaida and radical Islamic terrorist groups with ]s.
|}
|-
| ] || ] ||
* Told his Tribunal:
:{|
|
"The guards here wear the same Casio watch I did. The watch I was wearing looked like the same one the guards wear here. Does that mean they're al-Qaeda members?"<ref>, '']'', ] ]</ref><ref name="fox23news.com"/>
|}
|-
| ] || ] ||
* Allegedly captured wearing a '''Casio F91W'''.<ref name=Arb1MemoOmarKhalifaMohammedAbuBakr>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_1_Factors_000595-000693.pdf#12
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Abu Bakr, Omar Khalifa Mohammed (2005)
| pages=pages 12–15
| publisher=]
| author=]
| date=2005-10-26
| accessdate=2008-09-17
| quote=
}}
</ref><ref name=Arb2MemoOmarKhalifMohammedAbuBakerMahjoub>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_1_Factors_000595-000693.pdf#54
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Mahjoub, Omar Khalif Mohammed Abu Baker (2006)
| pages=pages 54–57
| publisher=]
| author=]
| date=2006-10-11
| accessdate=2008-09-17
| quote=
}}
</ref>
|-
| ] || ] ||
*Two of the factors favoring his continued detention, offered to his second annual Administrative Review Board, on ] ], were<ref name=Arb2SummaryOfEvidenceAbdulWahab>
{{cite web
| url=http://www.dod.mil/pubs/foi/detainees/csrt_arb/ARB_Round_1_Factors_001046-001160.pdf#59
| title=Unclassified Summary of Evidence for Administrative Review Board in the case of Abdul Wahab
| publisher=]
| author=]
| date=] ]
| pages=pages 59-60
| accessdate=2007-10-06
}}</ref>:
:{|
|
*"The detainee was on a list of personnel who had a '''casio watch''' in his possession on 1 May 2003."
*"Terrorism experts have said a Casio watch is a signature component of bombs made by militants trained in Saudi millionaire ]'s terrorist camps in Afghanistan. Islamic militants are routinely trained by Usama bin Laden's operatives to wire Casio watches to explosives."
|}
|-
| ] || ] ||
* Told his tribunal:
:{|
|
"This watch is not from al-Qaida, it's not used for a bomb, This is just a regular watch. All older, younger men and women use this watch everywhere."<ref name=Ap060309/>
|}
|-
| ] || ] ||
*One of the factors favoring continued detention, offered to his Administrative Review Board, to justify his continued detention, was:<ref name=ArbShabirAhmed>, from ]'s ''] hearing'' - page 203-216</ref>
:{|
|
*"The detainee possessed a '''Casio watch''', the model of which has been used in bombings that have been linked to al Qaida with improved ''{{sic}}'' explosive devices."
|}
|}

==Components of an al Qaeda bomb-making kit==
{{Splitsection|date=February 2009}}
The charge sheet filed against ], on ] ], contained a charge that listed the components of an al Qaeda bomb-making kit<ref name=MilitaryCommissionCharges2005NovJabranAlQahtani>{{cite web
| url=http://www.defenselink.mil/news/Nov2005/d20051104qahtani.pdf | url=http://www.defenselink.mil/news/Nov2005/d20051104qahtani.pdf
|format=PDF| title=USA v. al Qahtani |format=PDF| title=USA v. al Qahtani
Line 345: Line 26:
| accessdate=2007-02-27 | accessdate=2007-02-27
| publisher=] | publisher=]
}}</ref><ref name=MotherJones060712> , '']'',
}}</ref>:
] ]</ref><ref name=Wcvb>, '']'', ] ]</ref><ref name="SummaryOfEvidence415"> prepared for ]'s '']'' - ] ] - page 216</ref> This association was highlighted in the ], and may have been used in some cases at the ].<ref>, '']''</ref> An article published in the '']'' in 1996 reported that ], ], and ]
{{quotation|
had developed techniques to use commonly available Casio digital watches to detonate time bombs that didn't look like traditional time bombs.<ref name=WashingtonPost19960721>
Shortly after receiving the money for the components, ], ] and other individuals staying at the house went into downtown ] with a five page list of electrical equipment and devices for purchase which included, ''inter alia, '' electrical ]s, plastic resistors, light bulbs for circuit board lights, plastic and ceramic ]s, circuit testing boards, an ], '''watches''', soldering wire, ]s, wire and coil, six ]s of a specified model, ]s and an electronics manual.
}}

An article published in the '']'' in 1996
reported that ], ], and ]
had developed techniques to use Casio digital watches to detonate time bombs that didn't look like traditional time bombs.<ref name=WashingtonPost19960721>
{{cite news {{cite news
| url=http://www.washingtonpost.com/wp-srv/national/longterm/twa800/bomb.htm | url=http://www.washingtonpost.com/wp-srv/national/longterm/twa800/bomb.htm
Line 363: Line 39:
| quote= | quote=
}}</ref> }}</ref>
The article stated: {{quotation|At the heart of each device was a timer built by rewiring a commonly available Casio digital watch, which could be connected to a stabilized form of liquid nitroglycerin stored in a bottle ostensibly filled with contact lens solution. The stabilizer for the nitroglycerin looked like cotton, and Murad told interrogators that "nobody can think that it's . . . explosive."}}


==References== ==References==

Revision as of 18:00, 2 March 2009

Casio F91W, in daily alarm mode and using 24hr display option. The watch is currently set to sound its daily alarm, at 7:30am but hourly beeps are disabled.

The Casio F91W is an inexpensive quartz digital watch, manufactured by the Japanese firm Casio Computer Co., Ltd.. It was introduced in 1991. This watch is widely available throughout the world in various packaging.

Specifications

The F91W has a 1/100 second stopwatch with a capacity of up to 59' 59.99" and measuring modes of net time, split time, and 1st-2nd place times. There are the options of an hourly time "beep" and a daily alarm. It has an automatic calendar, although adjustment for leap-years is not supported as the watch does not record the year.

The manufacturers say the watch is accurate to ±30 seconds per month. It uses a CR2016 lithium battery, with a claimed battery life of approximately seven years (assuming 20 seconds of alarm and 1 second of light usage per day). The watch case measures 37.5 x 33.5 x 9.5 mm and weighs 20 g. The manufacturer's module number for this model (stamped on the stainless steel rear of the watch case) is 593. The watch front is marked 'WATER RESIST', but this means 'splashproof' only, and it cannot be used when showering or swimming/snorkeling.

Since the watch was introduced in 1991 it has only been updated once. The change was to the backlight (for example Casio A-168W) which went from the standard light in older watches to the blue-green electro-luminescent backlight seen in many of today's watches.

Operation

The watch is controlled by three side push-buttons. The upper left button turns on the backlight, cancels the alarm, and is used for selecting settings. The lower left button cycles the modes of the watch: → Alarm → Stopwatch → Time adjustment and back to the normal time display. The button on the right is the function button: when used after pressing the lower left mode button it starts and stops the stopwatch, or changes the settings currently being adjusted; but when pressed alone switches between the 12 and 24 hour modes.

The time or date is adjusted by pressing the lower left button three times to bring the watch to time adjustment mode. This causes the seconds to flash on the display. The top left button is pressed to cycle through seconds, hours, minutes, month, date, day, and normal mode. The right button is then pressed to adjust the flashing value displayed. When the adjustments are finished, the bottom left button is pressed repeatedly until the watch returns to normal mode.

The watch's display shows the day of the week, day of the month, hour, minute, seconds, and the signs for PM (or 24-hour clock), alarm signal, and hourly signal (double beep on the hour).

In stopwatch mode, minutes, seconds and hundredths of a second are shown.

Claimed use in terrorism

United States intelligence officials have identified the F91W as a watch that terrorists use when constructing time bombs. This association was highlighted in the Denbeaux study, and may have been used in some cases at the Guantanamo Bay detention camp. An article published in the Washington Post in 1996 reported that Abdul Hakim Murad, Wali Khan Amin Shah, and Ramzi Ahmed Yousef had developed techniques to use commonly available Casio digital watches to detonate time bombs that didn't look like traditional time bombs.

References

  1. "USA v. al Qahtani" (PDF). US Department of Defense. November 7 2005. Retrieved 2007-02-27. {{cite web}}: Check date values in: |date= (help)
  2. "Why Am I in Cuba?", Mother Jones (magazine), July 12 2006
  3. Guantanamo Captives Jailed Because Of Digital Watches, WCVB, March 10 2006
  4. Summary of Evidence memo (.pdf) prepared for Sabri Mohammed Ebrahim Al Qurashi's Combatant Status Review Tribunal - October 13 2004 - page 216
  5. Empty Evidence (02/03/2006), National Journal
  6. R. Jeffrey Smith (July 21 1996). "New Devices May Foil Airline Security". Washington Post. pp. A01. Retrieved 2008-03-14. {{cite news}}: Check date values in: |date= (help)

External links

Categories: