Crew suddenly developes undocumented third 'local ability.'

[Juju]

I've just returned from my third patrol and noticed one of my rear torpedo room guys now has a third ability, a 'local ability' named 'increased surface speed.' And one of my engine room crew also suddenly sports a third ability that says 'increased torpedo speeds.'

This one is completely new to me! I've searched the forum about it, but nothing came up.

The manual doesn't mention this. No more in-game info available either. So, okay, the abilities speak for themselves, but what about the term 'local ability?' It could suggest such a crewmember needs to be in a specific compartment for his ability to work (i.e. increaded torpedo speed guy should be in a torpedo room for that ability to work).