I am not sure it's fair to use services like that for these purposes. Even if you have a permit/license for these services, they aren't for general telecommuni

I am not sure it's fair to use services like that for these purposes. Even if you have a permit/license for these services, they aren't for general telecommunications such as thirdparty messages between distant land stations, whether or not a marine or aero station is involved in relaying them. I suspect that this operation will be using phone and digital modes. CW and 10m are rather small, but interesting and valuable, niches. For this case, CW will be slow and 10m will be unreliable. Generally, it is easier to join the party by learning to pass the General exam, than waiting for a 10m opening or learning telegraph code :)