Keen Eye

This skill is mostly useful for exploration: it reduces the chance of someone dying from MIA, which often is an instant death for the poor soul.

It also reduces the chance of stowaways that may follow you back to your ship after the exploration. While a bunch of nibblers shouldn't be a problem, a young mankarog very well might be.

It might also be used in investigation, to spot items that were hidden or someone searching room for said items. It could be the hidden by a  or a Mush looking for the hidden.