Monday, October 2, 2017
Clarifying the 72 minutes חשבון - Satmar Rov was correct (in Europe)
Yosef 718 comments on Shabbos Schedule for Satu-Mare, January 3-4, 1936:
There is a misunderstanding as to how the 72 מינוט works. What we need to know is that anywhere in the world is 'above' sea level (otherwise we would be under water). Sunset in American Luchos are set to 72 minutes after sunset, as if where you are it was at sea level. Of course that creates a small differential, as the shkia to the naked eye seems earlier than at the sea level. Lemashal, here in Boro Park if I actually see the sunset it will dip behind 6th Avenue, (which sits on top of a rise) but if I quickly drive to 6th Ave I will still get to see the full sun! Nobody in Satmar, Tzanz, Belz or Sighet ever knew when the imaginary sea-level shkia is. So that simply explains the 2 minute difference. Google gives you the sea-level shkia. And Satmar Rebbe gave the 'what-you-see-is-what-you-get' Shkia and started counting 72 minutes accordingly. The question is why is the Hisachdus luach based on sea-level? Could be that the Rabbonim were not aware of the difference. And used the Navy information as an easy way to know when the shkia is. PS I got the new Chabad Luach for Brooklyn and it also notes this distinction for all halochos. It is a fantastic luach with everything explained.