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Weapons & Equipment » Search » Chassis Modification, Environmental (Vacuum) Sealing
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General Details
Name: Chassis Modification, Environmental (Vacuum) Sealing
Type (Category): Equipment (Other)
Reference: Tactical Operations: Advanced Units & Equipment (p. 115)
Description:
Evolved for the battlefields of the Succession Wars, many conventional vehicles and fighters drew increasingly generalized toward a certain set of standard conditions, which ultimately served to limit their options in terms of environmental functionality. Amphibious capabilities, dune buggy modifications and environmental sealing against vacuum all became optional features, available to a multitude of units, but not commonly seen on the majority.
Most ground-based Combat Vehicles may be modified for vacuum fairly easily, though to perform in such environs these vehicles require fuel cell, fission or fusion engines for power. Because these modifications are so extensive and costly in terms of weight, environmentally sealed (or vacuum-sealed) units are a relative rarity on the battlefield, leaving most combat in the absence of breathable air to BattleMechs and fighters.
Game Rules:
All Combat Vehicles with the Environmental (Vacuum) Sealing modification operate normally in toxic or tainted atmospheres, and may even function in vacuum if fitted with a fission, fusion or fuel cell engine. However, this benefit is lost (and the unit is destroyed) if all armor in any location is destroyed, or if the unit suffers a hull integrity breach when taking damage. This hull integrity check is made any time the unit suffers damage, with a breach occurring on a 2D6 roll result of 10 or higher.
Unit Type Availability
Combat Vehicles
Inner Sphere Data (Combat Vehicles)
| Prototype Date: | 2470 |
| Production Date: | 2475 |
| Extinction Date: | — |
| Recovery Date: | — |
Combat Vehicle Specific Construction Rules
May be mounted on Inner Sphere units in accordance with the following construction rules:
 Not allowed if Naval (Submarine) is selected for the unit's Motive Type
Heat
Damage
Range
Rating
Availability
Cost (C-bills)
Weight (Tons)
Criticals
Battle Value
Direct-Fire
Explosive
–
–
–
B
C-D-C-B
1.25xTC
TT÷10
0
+0.1
—
—
TC = Total Unit Cost (in C-bills, applied to final calculations) TT = Total Unit Tonnage RULES LEVEL PROGRESSION TABLE
Start Year
End Year
Rules Level
ALPHA STRIKE WEAPON CONVERSION TABLE
Heat
Short Medium Long Extreme Special Abilities
—
— — — — Environmental Sealing, Space Operations Adaptation
Special Unit Abilities
The special unit abilities described here are intended for use with the Alpha Strike rule system:
Environmental Sealing (SEAL)
A unit with this special ability may operate in hostile environments (including underwater, vacuum, and so forth). Aerospace units, ProtoMechs, combat vehicles, and support vehicles built as submarines are automatically treated as if they have this ability. Space Operations Adaptation (SOA)
A unit with this special ability can operate in vacuum, but is not capable of spaceflight on its own.
MegaMek Output → Critical Slot: Environmental Sealed Chassis
Record Sheet Output → Critical Slot: Environmental (Vacuum) Sealing
Clan Data (Combat Vehicles)
| Prototype Date: | 2470 |
| Production Date: | 2475 |
| Extinction Date: | — |
| Recovery Date: | — |
Combat Vehicle Specific Construction Rules
May be mounted on Clan units in accordance with the following construction rules:
Not allowed if Naval (Submarine) is selected for the unit's Motive Type WEAPONS AND EQUIPMENT COMBAT AND CONSTRUCTION TABLE
Heat
Damage
Range
Rating
Availability
Cost (C-bills)
Weight (Tons)
Criticals
Battle Value
Direct-Fire
Explosive
–
–
–
B
C-D-C-B
1.25xTC
TT÷10
0
+0.1
—
—
TC = Total Unit Cost (in C-bills, applied to final calculations) TT = Total Unit Tonnage RULES LEVEL PROGRESSION TABLE
Start Year
End Year
Rules Level
ALPHA STRIKE WEAPON CONVERSION TABLE
Heat
Short Medium Long Extreme Special Abilities
—
— — — — Environmental Sealing, Space Operations Adaptation
Special Unit Abilities
The special unit abilities described here are intended for use with the Alpha Strike rule system:
Environmental Sealing (SEAL)
A unit with this special ability may operate in hostile environments (including underwater, vacuum, and so forth). Aerospace units, ProtoMechs, combat vehicles, and support vehicles built as submarines are automatically treated as if they have this ability. Space Operations Adaptation (SOA)
A unit with this special ability can operate in vacuum, but is not capable of spaceflight on its own.
MegaMek Output → Critical Slot: Environmental Sealed Chassis
Record Sheet Output → Critical Slot: Environmental (Vacuum) Sealing
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