If in lowsec or below alarm to play on each new ship on the grid and into client overview.
If in high sec, on each war target on grid or as soon as someone turns suspect.
Alarm can be disabled from a button on the ship status.
Long range sensors should update status automatically proportional to range. Remove having to manually click scan. At min range update frequency should be e.g. double that of grid overview.
How is the overview updated? Pushed from server or on some periodic cycle of server ticks?