While researching this question I came across a picture of the gravestone of Reb Arye Kaplan זצ"ל.
The post-final line reads:
נפטר בש"ט בי"ד בשבט תשמ"ג
What does the abbreviation
בש"ט stand for? All I can think of is 'בשעה טובה' - hardly appropriate for a deceased in a good time, especially since he was all of 48 years old! :-(