[FT] Simple EW

I see many complicated systems for EW that look neat, but that 1 hour lunch
break doesn't allow that much complexity. What we are going to try is this

Visual ID and all info on ship:
0-12 (basing this on the fact that a needle beam can pick out targets)

Civilian Sensors

0-12 ship mass
12-24 targetting info

Military Sensors

0-12 ship ID
12-24 ship mass
24-36 targetting info

Enhanced sensors (1 mass) shift this up one, so:

0-24 ship ID
24-36 ship mass
36-48 targetting info

Superior sensors (2 mass) shift up another one so:

0-36 ship ID
36-48 ship mass
48-60 targetting info

ECM requires 5% of the ships mass, 1 mass minimum It has two modes:

Mode 1, "hide mode"

Reduces the range brackets by 1, so Standard Military sensors are:

0-12 ship mass
12-24 targetting info

Mode 2, "mimic mode"

In ranges where sensors may detect mass a ship using mimicry EW may increase
it's apparent mass by 50 for each mass of the ECM system.

Both detection and ECM systems cost 5 per mass of the system.

No die rolls, quick and easy. Does it all sound plausible?