What bugs me is that some telepresence has a 30 km range, and others have an infinite range. That makes zero sense. Either they're all short range, or they're all long range. Pick One Frontier, Please.
If you run with the telepresence idea for the time being (Mosfoot, I actually agree crew log ins are a good idea but complicates, and imo, over reach for 2.3. In any case we definitely want our avatar to have a position in 3D space in the normal game mode; To be locatable on another moving ship and to be able to interact with it, as multicrew eventually becomes a different issue to space legs?) Then Ziljan there's a difference between crewing a ship from far away imo .. and telepresenct crewing of a fighter from the ship (with the 30km range limit) nearby.
If you assume you need some form of Subspace technology, to send (a more complicated signal than just comms), no reason why it should fit in the very small fighter, which might have room for a radio tranceiver but not the subspace version. You can't access navigation in fighter for instance but you could maybe, if you were able to relay a subspace signal, captured by the larger long-range tranceiver on the ship and passed it on to fighter by FM / medium wave, radio. Looks like you will be able to relay a telepresence signal in multicrew, 2.3 (no news on navigation data relay coming, as far as I know).
Lack of Transponder on the fighter means 30km range, may be for security / identification purposes. This is a different issue from comms (lore) but if fighter can't fit a transponder how coud you award bounties? The range is actually about instance bubble sizes IIRC but in lore does provide a way to identify the fighter, as it has to stay in range of mother-ship (self destructing by manufacturer design, perhaps as a condition, of their license to build and sell fighters.?)
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