here again my traveller roots show, but it also applies to GURPS which divide sensors into active and passive sets at the starship level.
my source for this is the TNE version of Fire, Fusion and Steel
The Active EMS array includes a variety active and passive emitters and detectors covering most of the Electromagnetic spectrum.. making it a much more sophisticated version of Radar
Densitometers
Neutrino Sensors
Neural Activity Sensor
High Resolution Thermal
The Passive EMS Array uses large antennae arrays to detect any electromagnetic emanations from a potential target, such as heat radio and light, Its an extremely sophisticated and precise sensor.
I know this isnt probably a lot of help, but I cant seem to find my copy of the Starship Operators Manual for Megatraveller. which went into more detail
Captain of the Free Trader Beowulf
This is Free Trader Beowulf,
Calling Anyone...
Mayday, Mayday we are under attack...
main drive is gone...
turret number one not responding...
Mayday... losing cabin pressure fast...
calling anyone.. please help..
This is Free Trader Beowulf..
Mayday...
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