Hull Integrity
Hull Integrity is a feature that currently affects Seabases. When the player is building their seabase they should pay attention to the hull strength, as it drops each time the player adds a module to their seabase. Once the seabase's hull strength, or Hull Integrity reaches 0 the seabase will flood with water, much in the same way as the Cyclops floods.
A seabase starts with a base integrity of 10, however, this does not include the additional +2.0 the foundation adds. The depth of your seabase influences the Hull Integrity, and a seabase above water does not have Hull Integrity.
Integrity Values
Each module in a seabase changes the value of the hull strength. Here is a list of current modules and their base changes to seabase Hull Integrity:
Foundation: +2.0
Corridor: -1.0
L-Corridor: -1.0
T-Corridor: -1.0
X-Corridor: -1.0
Hatch: -1.0
Bulkhead: +2.0
Ladder: N/A
Reinforcement: +7.0 (+14.0 when built on the North, South, East, or West side of a room. This may be a glitch)
Window: -1.0
I-Corridor Glass: -2.0
L-Corridor Glass: -2.0
Room: -1.25 (Game rounds the displayed number up to -1.3, but it is functionally -1.25)
Observatory: -3.0
Depth Multiplier
As you build deeper underwater, negative influences on Hull Integrity are multiplied. Positive changes to Hull Integrity do not vary by depth, so a foundation will always give +2.0 no matter how deep it is built, but a window that is built with a x1.5 depth multiplier will give -1.5 (instead of -1.0). Anything above 100 meters does not affect the depth multiplier.
< 100 meters: x1.0 (No change to the base values)
Each individual module of a seabase has its own depth multiplier.