If the Reapers can let their presence be known as a warning, then the Athena’s should be able to as well.
Whenever I’m looking for Reapers Emissaries while sailing Athena’s Emissary I always sails the Reapers Mark just to let others know I'm looking to fight. But that doesn’t make much sense in the lore.
It would be much more immersive If I could raise a “Flag of the Athena’s Mark” that can be seen across the server like the Flag of the Reapers Mark.
It could mean many things. To me it would tell the server that they have a guardian that will protect them from the Reapers. But it could also warn the server of Legendary pirates.
Just for fun tho, my head canon for now is that I’m a sea dog in wolfs clothing, protecting the flock. Pretending to be a reaper with the reapers mark until they get close enough to see that I’m really an Athena🍺🍺
Edit: There could also be Athena’s mark beacons lighting the way to Athenas loot that’s marked on the map like the reapers chest.
