Visual Sensors

Visual Sensors are - to be honest about it - a ultra High-Tech camera/telescope with suprisingly cool name. They are a basic type of active sensor, used to take a closer look at ships already detected by EMS, to make an attempt to discovering their configurations and variants to better prepare for a battle.
Contrary to EMS, they actually can be fooled. Both passively (a raider made to look like a cargo vessel) or actively (a nanopaint made to automaticaly change colors to look like a space behind it). They also can't see anything hidden behind particle shield, with the aforementioned nanopaint (relatively standard among the space navies) severely limiting its range.