KMST 1.2.410 - Skill Changes

I'm sure google translate is more credible than I am. Alternatively, you could read what the entire skill does.

Let me rephrase it:

Normally the crew summons do 310%, 300%, and 240%. With the "Crew Ship Commander" skill, the crew's damage would go up by +10% making them do 341%, 330%, and 264% (Like how Satellite Safety upgrades the damage of the Satellite summons).

When you actually summon a crew member, you'd get an additional +30 atk to your range, just like any other buff (to replace the +atk that Corsairs used to get while riding on the boat).

Since the rest of the skill is fairly straight-forward, I didn't bother mentioning it:
* If Muirhat is summoned, you get +10% higher critical damage
* If Valerie is summoned, you get +10% critical rate
* If Jack is summoned, you get +20% HP/MP and +20 speed.

As far as I can tell, we are both hypothesizing. If you have evidence, or have seen that the crew will increase your damage (rapid fire, fusillade, etc.) by +10%, just say so.

Then its the other way around? Higher numbers get taxed more i guess? or is it just the same regardless..

That would only make sense if the PDR was a "progressive tax", but it's not. It's a "flat tax".

To put it into an equation:
(X% * PDR_Const) + (Y% * PDR_Const) = (X% + Y%) * PDR_Const

And for an example with numbers:
If you have Rapid Fire (X% = 330%) and Final Attack (Y% = 70%), and are fighting a monster with 20% PDR (PDR_Const = 0.8), you get:
(330% * 0.8) + (70% * 0.8) = 264 + 56 = 320%
and
(330% + 70%) * 0.8 = 400% * 0.8 = 320%