Currently devices on submarine are being fixed much faster once a specific level cap gets reached and no faster before or after that. I do believe durability of devices should always be restored proportionally to level of a character in a specific skill for it instead of giving level thresholds. Here's an example:

How it currently works (example): [if ; superskill ⩾ 30 ; repairspeed = 40 ; else ; repairspeed = 10]

How I want it to work (example): [repairspeed = superskill * 0,8]

In case if both current and my conception would have to be composed (example): [if ; superskill ⩾ 30 ; repairspeed = superskill * 0.8 ; else ; repairspeed = superskill * 0,6]

I don't know how coding in Blitz 2D exactly works. This is just a makeshift coding example.