Okay, this is a really interesting topic that I wish I had noticed a month ago
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I will try to be as active in these topics as possible.
However, is there a reason for it to be fragmented throughout the forum? I mean, fiction like Shetland/Ephesus did consist of only one topic without any problems...
Last-minute note to Captain Aditya Haldar, coming from a friendly soul:
1. The rules have changed - perhaps the same phenomenon that allowed jump nodes to exist also caused subspace travel to be confined to the interior of a star system (excluding nodes), thus it might be possible to attempt jumps outside of the system. Have someone check this possibility.
2. If point 1. isn't true, you need to also consider the possibility of jumping much further than normally possible. I know it's extremely energy expensive, but you've got a supernova detonating right behind you. Perhaps try to make use of that.
Both methods require extensive modifications of navigational systems. You can buy your crew the time for that if you jump as far away from the star as possible:
The total mass of Dubhe star system is over 6 solar masses, therefore the same gravity field intensity is present at nearly 2,5x the distance from the star when compared to Sol. If we assume your vessel is still able to successfully attempt subspace transits in the Kuiper Belt, even if barely, then you've got about 20 hours for working on a solution - if you reach limits of your subspace drive.
Godspeed to you, Captain, and to your crew.