I doubt there's historical precedent to that - because if communications with a US military vessel are lost, then there would be an immediate search for her, while a starship may stay out of contact with anybody else for months at a time and never be considered "missing" or otherwise distressed (say, the Yamato in "Contagion").
Incidentally, Memory Alpha lists "Contagion" as an example of the ship automatically raising shields and the Red Alert being declared as a consequence. But this seems to be false: nothing of the sort really happens in that episode.
In contrast, TOS definitely features a couple of eps where our heroes declare "the shields just came up on their own, I guess there's something dangerous ahead". Say, "The Changeling".
Perhaps the auto-shield function was usually disabled on Picard's ship because it would have been the cause of too many diplomatic misunderstandings, and Picard wanted to do diplomacy. More importantly, he could afford to: his superior giant of a ship could take a bit of a beating from an adversary without being aggressive (say, raising combat shields) in return, and thus defuse a situation so that diplomacy could commence.
Are there any actual instances of auto-shields in TNG/DS9/VOY?
Timo Saloniemi
Incidentally, Memory Alpha lists "Contagion" as an example of the ship automatically raising shields and the Red Alert being declared as a consequence. But this seems to be false: nothing of the sort really happens in that episode.
In contrast, TOS definitely features a couple of eps where our heroes declare "the shields just came up on their own, I guess there's something dangerous ahead". Say, "The Changeling".
Perhaps the auto-shield function was usually disabled on Picard's ship because it would have been the cause of too many diplomatic misunderstandings, and Picard wanted to do diplomacy. More importantly, he could afford to: his superior giant of a ship could take a bit of a beating from an adversary without being aggressive (say, raising combat shields) in return, and thus defuse a situation so that diplomacy could commence.
Are there any actual instances of auto-shields in TNG/DS9/VOY?
Timo Saloniemi