Viewing Weapons & Equipment
Weapon & Equipment Information
General Details
Name:  Null-Signature System
Type (Category):  Equipment (Other)
Technology:  Inner Sphere
Available To:  BattleMechs (BM)
Reference:  Tactical Operations: Advanced Units & Equipment (p. 148)

Description:
Description not provided

Game Rules:
Game rules not provided

Construction Rules:
May be mounted on any available unit type with adherence to the following construction rules:
 Not allowed if Land-Air (Bimodal), or Land-Air (Standard) is selected for the unitís Chassis
 May not be pod-mounted when used on an OmniMech
 Not allowed if Stealth is selected for the unitís Armor Type
 Not allowed in conjunction with C3 Boosted Master, C3 Boosted Slave, C3 Computer (Master), C3 Emergency Master, C3 Slave, Improved C3 Computer, or Void-Signature System
 May mount up to one per unit
 Not allowed if Targeting Computer is selected for the unitís Targeting and Tracking System
Inner Sphere Data
Prototype Date:  ~2615
Production Date:  —
Extinction Date:  2790
Recovery Date:  ~3110

WEAPONS AND EQUIPMENT COMBAT AND CONSTRUCTION TABLE
Heat (Aero)
Damage (Aero)
Range (Aero)
Rating
Availability
Cost (C-bills)
Weight (Tons)
Criticals
Battle Value
Direct-Fire
Explosive
10 (0)
– (–)
– (–)
E
1,400,000
0.000
*
* See rules for this equipment

Additional Construction Rules
The following construction rules extend the ones previously listed and are applicable for this technology base:
 Requires one critical slot to be allocated in each of the Arms, Legs, and Torsos

RULES LEVEL PROGRESSION TABLE
Start Year
End Year
Rules Level
~2615
2789
Experimental
~3110
Experimental

ALPHA STRIKE WEAPON CONVERSION TABLE
Heat
Short
Medium
Long
Extreme
Special Abilities
Stealth

Special Unit Abilities
The special unit abilities described here are intended for use with the Alpha Strike rule system:
 Stealth (STL)
Though various stealth systems exist in the BattleTech universe, the majority are similar enough in function that Alpha Strike does not distinguish between them. These systems make a target more difficult to hit with weapon attacks (but not physical attacks), based on the range and unit type being targeted.

For attacks made against non-infantry targets with the STL special, apply an additional +1 Target Number modifier to attacks at Medium range, and an additional +2 modifier at Long range (or greater).

For attacks made against battle armor targets with the STL special, apply an additional +1 Target Number modifier at Short and Medium range, and an additional +2 modifier at Long range (or greater).

A non-infantry unit with STL is (intentionally) blocking its own emissions with its ECM. Any non-infantry Stealth unit is affected as if in an enemy ECM field, and cannot affect other units with its own ECM. However, if using the ECM/ECCM optional rules, a unit with AECM may still generate a single field (ECCM only) while the Stealth is on.

Toggling Stealth: To avoid being affected by its own ECM, a non-infantry unit with STL may toggle off its Stealth special ability in the End Phase. Place a mark above or through the Stealth special ability to note that it is off. It may be toggled back on in any subsequent End Phase.

MTF Output → Critical Slot:  Mek Null Signature System
PDF Output → Critical Slot:  Null-Signature System