وَنَبِّئْهُمْ أَنَّ ٱلْمَآءَ قِسْمَةٌۢ بَيْنَهُمْ ۖ كُلُّ شِرْبٍ مُّحْتَضَرٌ ٢٨
And inform them that the water is shared between them, each [day of] drink attended [by turn].
Your location stays on this device and is only sent, rounded to about 1 km, to fetch the times.