Web mines cause problems with fuel, and cause delays in the game. Starships with the Web Mine Immunity ability can reduce those problems. Currently, the only starship that has Web Mine Immunity is the Sapphire Class Space Ship, which can be researched by the Crystals for use in Campaign games.
The Web Mine Immunity of the Sapphire protects all starships that are traveling with it from the ravages of web mines (no fuel drain and no impact), allowing safe passage through Web minefields. This is due to the unique design of the Hyperjump engines in the Sapphire.
It should be noted that in order to be considered to be traveling with the Sapphire, a starship must have the same start point, endpoint and speed, or must be towing it. If the Sapphire is being towed then the start point, endpoint and speed of the towing starship are used.
It should be noted that starships on an intercept mission, even if they have the same start point, endpoint and speed, will not be protected, as intercepting starships move after normal movement.
See also: Out of Fuel.