As promised in my post on 15 July, here are the results of the comparative test conducted aboard "Prince d'Oc" for our trip from Port Leucate to Dubrovnik.
Thanks to the loan of a complete IsatPhone Pro, avec station d’accueil et antenne extérieure (un grand merci à PYG @voilier_xhosa, who sent me all this from Belgium), and the presence of a similar facility Iridium on board Olivier's boat : Iridium 9575 avec antenne fixe extérieure Sailor, nous avons pu effectuer des tests en situation réelle d’utilisation.