well as far as my own research goes this is how the sensors seem to work in bc:
the number in the hp file for sensor range is in "units" which is used by bc to give in system range, what those units are i do not know. my tests showed the following:
at 500.88 km my ship can see a station with its sensors range at 2163.15 but with sensors 1% lower at 2147.37 my ship cannot see the station.
and with ship sensors at 31.59 the station can be seen at 5.53 km away.
(when i say see i mean the station appears in the tactical window)
but the number in
Galaxy Charts is used as Light Years for sensor analysis in
Stellar Cartography so many ships have for example 2000 ly range.
in normal system play though the number of the sensors range is utilized in Kobayosi Maru for inaccurate phasers, the lower the number in the hp the less chance to hit enemy ships. i set a ship to 17 sensor range and in game i could hardly hit the enemy galors (i used 17 because in tng:tech manual it says the range of the ent-D sensors is 17 ly)
is it possible to edit the files on my install to reduce the inaccuracy when using a cannon number for the sensors. (note: i cannot find the file responsible for inaccurate phasers)