Today is World Marine Aids to Navigation Day, annually sponsored by the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA). The images on my tie show a compass, a sextant, a spyglass, an astrolabe, a treasure map, and a spiked star (which may simply give directional cues when pointed to the heavens). My cell phone has a compass, star chart, maps, and altitude and latitude/longitude finders. But those apps must have some sort of network connection to operate, unlike the handheld optical and mechanical devices so famous in marine navigation. Today is also National Creative Ice Cream Flavors Day, according to the National Day Calendar.
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