A rated long range sensors on my combat ships. Yes my Vette would be 10m/s faster with D rated lightweight sensors, but still slow. It would not be able to see that juicy Conda at 14km distance in the res site though. My Mamba loses 5 m/s, big deal, it's still fast. Having a whole view of the entire CZ furball and keeping a lock on a target that just dropped a heatsink is more important. My civilian ships carry a rated lightweight. NPC pirates are always close enough when they interdict me.