The USA’s National Coast Guard Museum will afford visitors the opportunity to journey through the history and evolution of search and rescue (SAR), from the mission’s infancy to modern-day practices.
In the earliest days of search and rescue along the shore, “there wasn’t a way for shore-based units to communicate beyond line of sight with a vessel or person in distress.”
Things evolved toward things like the breeches buoy, developed in the mid-19th century and was essentially a life ring with a pair of pants sewn on the inside.
“It wasn’t until circa 1906 when shipboard communication became standardized and the first international radio telegraph convention adopted SOS as the international distress signal,”
“The first search and rescue satellite came online in the mid-80s,” said Ed Thiedeman, a search and rescue systems specialist at Coast Guard Headquarters.
In essence, it’s a similar technology to that of a mobile phone.
It allows for more 406 beacons to be operated simultaneously without interfering with each other, Thiedeman said.
It enables rescuers to determine a more precise location of a mariner or vessel in distress.
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https://maritime-executive.com/editorials/the-evolution-of-modern-search-and-rescue