The gedolei Eretz Yisroel have once again issued a psak that it is best advised during flights to daven Shemonah Esrei sitting down, restfully, rather than standing up.
Among the gedolim who ruled this way recently was Rav Shteinman, who answered bochurim traveling overseas for bein hazemanim after they were concerned about difficulties in saying all the customary tefillos on board planes.
In other news, Rav Chaim Kanievsky was asked whether bathing in the sea is considered an overseas trip, which would be forbidden according to the halacha, as leaving Eretz Yisroel is assur. Rav Chaim answered that bathing in shallow water or at a reasonable distance from the shore was permitted, but that swimming to a greater distance not reached by the average swimmer, was problematic.
Rav Yosef Sholom Elyashiv and Rav Shteinman warned yeshiva bochurim last year of trips involving spiritual dangers. They called on parents to prevent their children from embarking on such trips on their own.