Now you can participate in "useless activity" together with outher ships
When looking at radar, your ship is surrounded by circles. Number of circles equals to number of radars your ship has, and you see some ships - each Cloak device other ship has negates one Radar device on your ship, so they will be able to come closer until you see them.
You might also notice a bug that even though the base has a radar, too, it still uses your ship radars to find other ships! This will be fixed later: each individual radar will have power of only a single radar, and to make use of multiple radars you'll have to use a Radar Computer. Or maybe there will be a way to upgrade radars?
As a bonus, the game also has a calendar. One in-game day takes one second of real time. Game starts on 1st of January, year 3000. Happy new year!