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A distress signal, also known as a distress call, is an internationally recognized means for obtaining help.Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance.
The colors available were a white flag with a red center, a black flag with a white center, and a red flag with a white center. All three were produced in the most commonly used four foot (120 cm) size. The white and black flags came in a six-foot (180 cm) size for greater range, and the white and red flags had a two-foot (60 cm) size. [14]
Flag Meaning As single flag With numeric complements A Alfa [ˈal.fa] "I have a diver down; keep well clear at slow speed." Azimuth or bearing B Bravo [ˈbrɑː.voʊ] "I am taking in or discharging or carrying dangerous goods." (Originally used by the Royal Navy specifically for military explosives.) C Charlie [ˈtʃɑː.li] "Affirmative." [a] [b]
Visual acuity with Near chart without correctors Visual acuity with eye chart at Near 15.7 inches (400 mm) and without (sc: Latin sine correctore) correctors (spectacles); Ncc is with (cc: Latin cum correctore) correctors. See Visual_acuity#Legal_definitions: VA OS Left visual acuity VA OD Right visual acuity VDU Visual display unit VF Visual field
ISO 7010 is an International Organization for Standardization technical standard for graphical hazard symbols on hazard and safety signs, including those indicating emergency exits. It uses colours and principles set out in ISO 3864 for these symbols, and is intended to provide "safety information that relies as little as possible on the use of ...
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Six points on the Star of Life. The six branches of the star represent the six main tasks executed by rescuers all through the emergency chain: [19] Detection: The first rescuers on the scene, usually untrained civilians or those involved in the incident, observe the scene, understand the problem, identify the dangers to themselves and the others, and take appropriate measures to ensure their ...
The U.S. Food and Drug Administration warns against buying or using some over-the-counter eye drops from major brands due to potential risk of vision loss. The FDA issued an alert Monday, updating ...